Finding the Third Proportional to 111,917,902.50 and 263,817,978.75

Step by Step Solution

1. Step 1: Write the proportion equation
   111,917,902.50 : 263,817,978.75 = 263,817,978.75 : x
2. Step 2: Convert to fraction form
   111,917,902.50/263,817,978.75 = 263,817,978.75/x
3. Step 3: Cross multiply
   111,917,902.50x = 263,817,978.75 × 263,817,978.75
4. Step 4: Simplify right side
   111,917,902.50x = 69,599,925,911,735,448
5. Step 5: Solve for x
   x = 69,599,925,911,735,448/111,917,902.50
6. Step 6: Final answer
   x = 621,883,759.05