Finding the Fourth Proportional to 21,738.92, 29,932.53 and 16,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,738.92 : 29,932.53 = 16,978.10 : x
2. Step 2: Convert to fraction form
   21,738.92/29,932.53 = 16,978.10/x
3. Step 3: Cross multiply
   21,738.92x = 29,932.53 × 16,978.10
4. Step 4: Simplify right side
   21,738.92x = 508,197,337.93
5. Step 5: Solve for x
   x = 508,197,337.93/21,738.92
6. Step 6: Final answer
   x = 23,377.31