Finding the Fourth Proportional to 102,906,396.05, 142,011,074.45 and 56,499,641.33

Step by Step Solution

1. Step 1: Write the proportion equation
   102,906,396.05 : 142,011,074.45 = 56,499,641.33 : x
2. Step 2: Convert to fraction form
   102,906,396.05/142,011,074.45 = 56,499,641.33/x
3. Step 3: Cross multiply
   102,906,396.05x = 142,011,074.45 × 56,499,641.33
4. Step 4: Simplify right side
   102,906,396.05x = 8,023,574,770,744,120
5. Step 5: Solve for x
   x = 8,023,574,770,744,120/102,906,396.05
6. Step 6: Final answer
   x = 77,969,641.14