Finding the Fourth Proportional to 89,854,510.66, 124,074,810.96 and 56,872,943.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,854,510.66 : 124,074,810.96 = 56,872,943.20 : x
2. Step 2: Convert to fraction form
   89,854,510.66/124,074,810.96 = 56,872,943.20/x
3. Step 3: Cross multiply
   89,854,510.66x = 124,074,810.96 × 56,872,943.20
4. Step 4: Simplify right side
   89,854,510.66x = 7,056,499,676,278,817
5. Step 5: Solve for x
   x = 7,056,499,676,278,817/89,854,510.66
6. Step 6: Final answer
   x = 78,532,503.54