Finding the Fourth Proportional to 99,930.65, 137,887.92 and 59,089.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,930.65 : 137,887.92 = 59,089.10 : x
2. Step 2: Convert to fraction form
   99,930.65/137,887.92 = 59,089.10/x
3. Step 3: Cross multiply
   99,930.65x = 137,887.92 × 59,089.10
4. Step 4: Simplify right side
   99,930.65x = 8,147,672,404.23
5. Step 5: Solve for x
   x = 8,147,672,404.23/99,930.65
6. Step 6: Final answer
   x = 81,533.27