Finding the Fourth Proportional to 17,978.76, 24,810.20 and 10,020.81

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978.76 : 24,810.20 = 10,020.81 : x
2. Step 2: Convert to fraction form
   17,978.76/24,810.20 = 10,020.81/x
3. Step 3: Cross multiply
   17,978.76x = 24,810.20 × 10,020.81
4. Step 4: Simplify right side
   17,978.76x = 248,618,380.77
5. Step 5: Solve for x
   x = 248,618,380.77/17,978.76
6. Step 6: Final answer
   x = 13,828.45