Finding the Fourth Proportional to 64,288.71, 88,713.50 and 35,990.55

Step by Step Solution

1. Step 1: Write the proportion equation
   64,288.71 : 88,713.50 = 35,990.55 : x
2. Step 2: Convert to fraction form
   64,288.71/88,713.50 = 35,990.55/x
3. Step 3: Cross multiply
   64,288.71x = 88,713.50 × 35,990.55
4. Step 4: Simplify right side
   64,288.71x = 3,192,847,477.47
5. Step 5: Solve for x
   x = 3,192,847,477.47/64,288.71
6. Step 6: Final answer
   x = 49,664.20