Finding the Fourth Proportional to 31,064.29, 42,869.21 and 16,917.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,064.29 : 42,869.21 = 16,917.12 : x
2. Step 2: Convert to fraction form
   31,064.29/42,869.21 = 16,917.12/x
3. Step 3: Cross multiply
   31,064.29x = 42,869.21 × 16,917.12
4. Step 4: Simplify right side
   31,064.29x = 725,223,569.88
5. Step 5: Solve for x
   x = 725,223,569.88/31,064.29
6. Step 6: Final answer
   x = 23,345.89