Finding the Fourth Proportional to 94,456.71, 140,948.31 and 86,073.21

Step by Step Solution

1. Step 1: Write the proportion equation
   94,456.71 : 140,948.31 = 86,073.21 : x
2. Step 2: Convert to fraction form
   94,456.71/140,948.31 = 86,073.21/x
3. Step 3: Cross multiply
   94,456.71x = 140,948.31 × 86,073.21
4. Step 4: Simplify right side
   94,456.71x = 12,131,873,485.78
5. Step 5: Solve for x
   x = 12,131,873,485.78/94,456.71
6. Step 6: Final answer
   x = 128,438.45