Finding the Fourth Proportional to 31,077.39, 42,887.84 and 16,931.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,077.39 : 42,887.84 = 16,931.55 : x
2. Step 2: Convert to fraction form
   31,077.39/42,887.84 = 16,931.55/x
3. Step 3: Cross multiply
   31,077.39x = 42,887.84 × 16,931.55
4. Step 4: Simplify right side
   31,077.39x = 726,157,522.69
5. Step 5: Solve for x
   x = 726,157,522.69/31,077.39
6. Step 6: Final answer
   x = 23,366.10