Finding the Fourth Proportional to 31,142.76, 42,968.76 and 17,711.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,142.76 : 42,968.76 = 17,711.85 : x
2. Step 2: Convert to fraction form
   31,142.76/42,968.76 = 17,711.85/x
3. Step 3: Cross multiply
   31,142.76x = 42,968.76 × 17,711.85
4. Step 4: Simplify right side
   31,142.76x = 761,056,231.81
5. Step 5: Solve for x
   x = 761,056,231.81/31,142.76
6. Step 6: Final answer
   x = 24,437.66