Finding the Fourth Proportional to 87,648.76, 121,055 and 58,918.52

Step by Step Solution

1. Step 1: Write the proportion equation
   87,648.76 : 121,055 = 58,918.52 : x
2. Step 2: Convert to fraction form
   87,648.76/121,055 = 58,918.52/x
3. Step 3: Cross multiply
   87,648.76x = 121,055 × 58,918.52
4. Step 4: Simplify right side
   87,648.76x = 7,132,381,438.60
5. Step 5: Solve for x
   x = 7,132,381,438.60/87,648.76
6. Step 6: Final answer
   x = 81,374.58