Finding the Fourth Proportional to 31,126.02, 42,952.41 and 16,978.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,126.02 : 42,952.41 = 16,978.02 : x
2. Step 2: Convert to fraction form
   31,126.02/42,952.41 = 16,978.02/x
3. Step 3: Cross multiply
   31,126.02x = 42,952.41 × 16,978.02
4. Step 4: Simplify right side
   31,126.02x = 729,246,876.03
5. Step 5: Solve for x
   x = 729,246,876.03/31,126.02
6. Step 6: Final answer
   x = 23,428.85