Finding the Third Proportional to 78,057,990,672.50 and 105,318,557,008.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,057,990,672.50 : 105,318,557,008.50 = 105,318,557,008.50 : x
2. Step 2: Convert to fraction form
   78,057,990,672.50/105,318,557,008.50 = 105,318,557,008.50/x
3. Step 3: Cross multiply
   78,057,990,672.50x = 105,318,557,008.50 × 105,318,557,008.50
4. Step 4: Simplify right side
   78,057,990,672.50x = 11,091,998,450,352,664,870,912
5. Step 5: Solve for x
   x = 11,091,998,450,352,664,870,912/78,057,990,672.50
6. Step 6: Final answer
   x = 142,099,461,628.35