Finding the Fourth Proportional to 31,140.34, 42,973.47 and 17,711.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,140.34 : 42,973.47 = 17,711.55 : x
2. Step 2: Convert to fraction form
   31,140.34/42,973.47 = 17,711.55/x
3. Step 3: Cross multiply
   31,140.34x = 42,973.47 × 17,711.55
4. Step 4: Simplify right side
   31,140.34x = 761,126,762.58
5. Step 5: Solve for x
   x = 761,126,762.58/31,140.34
6. Step 6: Final answer
   x = 24,441.83