Finding the Fourth Proportional to 31,402.53, 43,337.90 and 17,978.00

Step by Step Solution

1. Step 1: Write the proportion equation
   31,402.53 : 43,337.90 = 17,978.00 : x
2. Step 2: Convert to fraction form
   31,402.53/43,337.90 = 17,978.00/x
3. Step 3: Cross multiply
   31,402.53x = 43,337.90 × 17,978.00
4. Step 4: Simplify right side
   31,402.53x = 779,128,594.46
5. Step 5: Solve for x
   x = 779,128,594.46/31,402.53
6. Step 6: Final answer
   x = 24,811.01