Finding the Fourth Proportional to 115,040.72, 172,405.56 and 59,675.60

Step by Step Solution

1. Step 1: Write the proportion equation
   115,040.72 : 172,405.56 = 59,675.60 : x
2. Step 2: Convert to fraction form
   115,040.72/172,405.56 = 59,675.60/x
3. Step 3: Cross multiply
   115,040.72x = 172,405.56 × 59,675.60
4. Step 4: Simplify right side
   115,040.72x = 10,288,405,236.34
5. Step 5: Solve for x
   x = 10,288,405,236.34/115,040.72
6. Step 6: Final answer
   x = 89,432.73