Finding the Fourth Proportional to 31,134.84, 42,966.20 and 16,988

Step by Step Solution

1. Step 1: Write the proportion equation
   31,134.84 : 42,966.20 = 16,988 : x
2. Step 2: Convert to fraction form
   31,134.84/42,966.20 = 16,988/x
3. Step 3: Cross multiply
   31,134.84x = 42,966.20 × 16,988
4. Step 4: Simplify right side
   31,134.84x = 729,909,805.60
5. Step 5: Solve for x
   x = 729,909,805.60/31,134.84
6. Step 6: Final answer
   x = 23,443.51