Finding the Fourth Proportional to 58,499.21, 80,728.92 and 31,641.71

Step by Step Solution

1. Step 1: Write the proportion equation
   58,499.21 : 80,728.92 = 31,641.71 : x
2. Step 2: Convert to fraction form
   58,499.21/80,728.92 = 31,641.71/x
3. Step 3: Cross multiply
   58,499.21x = 80,728.92 × 31,641.71
4. Step 4: Simplify right side
   58,499.21x = 2,554,400,671.61
5. Step 5: Solve for x
   x = 2,554,400,671.61/58,499.21
6. Step 6: Final answer
   x = 43,665.56