Finding the Fourth Proportional to 31,134.26, 42,965.55 and 16,987.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,134.26 : 42,965.55 = 16,987.34 : x
2. Step 2: Convert to fraction form
   31,134.26/42,965.55 = 16,987.34/x
3. Step 3: Cross multiply
   31,134.26x = 42,965.55 × 16,987.34
4. Step 4: Simplify right side
   31,134.26x = 729,870,191.31
5. Step 5: Solve for x
   x = 729,870,191.31/31,134.26
6. Step 6: Final answer
   x = 23,442.67