Finding the Fourth Proportional to 31,012.86, 42,796.51 and 16,865.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.86 : 42,796.51 = 16,865.71 : x
2. Step 2: Convert to fraction form
   31,012.86/42,796.51 = 16,865.71/x
3. Step 3: Cross multiply
   31,012.86x = 42,796.51 × 16,865.71
4. Step 4: Simplify right side
   31,012.86x = 721,793,526.67
5. Step 5: Solve for x
   x = 721,793,526.67/31,012.86
6. Step 6: Final answer
   x = 23,274.01