Finding the Fourth Proportional to 31,065.24, 42,869.52 and 16,917.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,065.24 : 42,869.52 = 16,917.78 : x
2. Step 2: Convert to fraction form
   31,065.24/42,869.52 = 16,917.78/x
3. Step 3: Cross multiply
   31,065.24x = 42,869.52 × 16,917.78
4. Step 4: Simplify right side
   31,065.24x = 725,257,108.07
5. Step 5: Solve for x
   x = 725,257,108.07/31,065.24
6. Step 6: Final answer
   x = 23,346.26