Finding the Fourth Proportional to 31,117.66, 42,978.22 and 22,657.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,117.66 : 42,978.22 = 22,657.62 : x
2. Step 2: Convert to fraction form
   31,117.66/42,978.22 = 22,657.62/x
3. Step 3: Cross multiply
   31,117.66x = 42,978.22 × 22,657.62
4. Step 4: Simplify right side
   31,117.66x = 973,784,177.04
5. Step 5: Solve for x
   x = 973,784,177.04/31,117.66
6. Step 6: Final answer
   x = 31,293.62