Finding the Fourth Proportional to 87,363.95, 120,264.72 and 64,660.15

Step by Step Solution

1. Step 1: Write the proportion equation
   87,363.95 : 120,264.72 = 64,660.15 : x
2. Step 2: Convert to fraction form
   87,363.95/120,264.72 = 64,660.15/x
3. Step 3: Cross multiply
   87,363.95x = 120,264.72 × 64,660.15
4. Step 4: Simplify right side
   87,363.95x = 7,776,334,233.58
5. Step 5: Solve for x
   x = 7,776,334,233.58/87,363.95
6. Step 6: Final answer
   x = 89,010.79