Finding the Fourth Proportional to 87,632.50, 120,791.18 and 68,479

Step by Step Solution

1. Step 1: Write the proportion equation
   87,632.50 : 120,791.18 = 68,479 : x
2. Step 2: Convert to fraction form
   87,632.50/120,791.18 = 68,479/x
3. Step 3: Cross multiply
   87,632.50x = 120,791.18 × 68,479
4. Step 4: Simplify right side
   87,632.50x = 8,271,659,215.22
5. Step 5: Solve for x
   x = 8,271,659,215.22/87,632.50
6. Step 6: Final answer
   x = 94,390.31