Finding the Fourth Proportional to 31,064.88, 42,870.06 and 16,917.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,064.88 : 42,870.06 = 16,917.96 : x
2. Step 2: Convert to fraction form
   31,064.88/42,870.06 = 16,917.96/x
3. Step 3: Cross multiply
   31,064.88x = 42,870.06 × 16,917.96
4. Step 4: Simplify right side
   31,064.88x = 725,273,960.28
5. Step 5: Solve for x
   x = 725,273,960.28/31,064.88
6. Step 6: Final answer
   x = 23,347.07