Finding the Fourth Proportional to 115,039.72, 172,404.06 and 59,674.60

Step by Step Solution

1. Step 1: Write the proportion equation
   115,039.72 : 172,404.06 = 59,674.60 : x
2. Step 2: Convert to fraction form
   115,039.72/172,404.06 = 59,674.60/x
3. Step 3: Cross multiply
   115,039.72x = 172,404.06 × 59,674.60
4. Step 4: Simplify right side
   115,039.72x = 10,288,143,318.88
5. Step 5: Solve for x
   x = 10,288,143,318.88/115,039.72
6. Step 6: Final answer
   x = 89,431.23