Finding the Fourth Proportional to 99,282.96, 137,010.78 and 56,841.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,282.96 : 137,010.78 = 56,841.78 : x
2. Step 2: Convert to fraction form
   99,282.96/137,010.78 = 56,841.78/x
3. Step 3: Cross multiply
   99,282.96x = 137,010.78 × 56,841.78
4. Step 4: Simplify right side
   99,282.96x = 7,787,936,614.39
5. Step 5: Solve for x
   x = 7,787,936,614.39/99,282.96
6. Step 6: Final answer
   x = 78,441.83