Finding the Fourth Proportional to 87,131.25, 120,277.89 and 58,875.21

Step by Step Solution

1. Step 1: Write the proportion equation
   87,131.25 : 120,277.89 = 58,875.21 : x
2. Step 2: Convert to fraction form
   87,131.25/120,277.89 = 58,875.21/x
3. Step 3: Cross multiply
   87,131.25x = 120,277.89 × 58,875.21
4. Step 4: Simplify right side
   87,131.25x = 7,081,386,032.11
5. Step 5: Solve for x
   x = 7,081,386,032.11/87,131.25
6. Step 6: Final answer
   x = 81,272.63