Finding the Third Proportional to 72,678,370.50 and 111,711,688

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,370.50 : 111,711,688 = 111,711,688 : x
2. Step 2: Convert to fraction form
   72,678,370.50/111,711,688 = 111,711,688/x
3. Step 3: Cross multiply
   72,678,370.50x = 111,711,688 × 111,711,688
4. Step 4: Simplify right side
   72,678,370.50x = 12,479,501,235,809,344
5. Step 5: Solve for x
   x = 12,479,501,235,809,344/72,678,370.50
6. Step 6: Final answer
   x = 171,708,599.82