Finding the Fourth Proportional to 17,978.21, 24,810.78 and 10,020.49

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978.21 : 24,810.78 = 10,020.49 : x
2. Step 2: Convert to fraction form
   17,978.21/24,810.78 = 10,020.49/x
3. Step 3: Cross multiply
   17,978.21x = 24,810.78 × 10,020.49
4. Step 4: Simplify right side
   17,978.21x = 248,616,147.83
5. Step 5: Solve for x
   x = 248,616,147.83/17,978.21
6. Step 6: Final answer
   x = 13,828.75