Finding the Fourth Proportional to 99,478.62, 137,322.99 and 59,196.15

Step by Step Solution

1. Step 1: Write the proportion equation
   99,478.62 : 137,322.99 = 59,196.15 : x
2. Step 2: Convert to fraction form
   99,478.62/137,322.99 = 59,196.15/x
3. Step 3: Cross multiply
   99,478.62x = 137,322.99 × 59,196.15
4. Step 4: Simplify right side
   99,478.62x = 8,128,992,314.49
5. Step 5: Solve for x
   x = 8,128,992,314.49/99,478.62
6. Step 6: Final answer
   x = 81,715.97