Finding the Fourth Proportional to 99,580.72, 137,451.72 and 59,301.04

Step by Step Solution

1. Step 1: Write the proportion equation
   99,580.72 : 137,451.72 = 59,301.04 : x
2. Step 2: Convert to fraction form
   99,580.72/137,451.72 = 59,301.04/x
3. Step 3: Cross multiply
   99,580.72x = 137,451.72 × 59,301.04
4. Step 4: Simplify right side
   99,580.72x = 8,151,029,945.79
5. Step 5: Solve for x
   x = 8,151,029,945.79/99,580.72
6. Step 6: Final answer
   x = 81,853.49