Finding the Fourth Proportional to 87,906.72, 121,311.86 and 47,620.48

Step by Step Solution

1. Step 1: Write the proportion equation
   87,906.72 : 121,311.86 = 47,620.48 : x
2. Step 2: Convert to fraction form
   87,906.72/121,311.86 = 47,620.48/x
3. Step 3: Cross multiply
   87,906.72x = 121,311.86 × 47,620.48
4. Step 4: Simplify right side
   87,906.72x = 5,776,929,002.89
5. Step 5: Solve for x
   x = 5,776,929,002.89/87,906.72
6. Step 6: Final answer
   x = 65,716.58