Finding the Fourth Proportional to 90,793.71, 136,208.39 and 31,631.31

Step by Step Solution

1. Step 1: Write the proportion equation
   90,793.71 : 136,208.39 = 31,631.31 : x
2. Step 2: Convert to fraction form
   90,793.71/136,208.39 = 31,631.31/x
3. Step 3: Cross multiply
   90,793.71x = 136,208.39 × 31,631.31
4. Step 4: Simplify right side
   90,793.71x = 4,308,449,650.53
5. Step 5: Solve for x
   x = 4,308,449,650.53/90,793.71
6. Step 6: Final answer
   x = 47,453.17