Finding the Fourth Proportional to 17,978.88, 24,810.96 and 10,021.61

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978.88 : 24,810.96 = 10,021.61 : x
2. Step 2: Convert to fraction form
   17,978.88/24,810.96 = 10,021.61/x
3. Step 3: Cross multiply
   17,978.88x = 24,810.96 × 10,021.61
4. Step 4: Simplify right side
   17,978.88x = 248,645,764.85
5. Step 5: Solve for x
   x = 248,645,764.85/17,978.88
6. Step 6: Final answer
   x = 13,829.88