Finding the Fourth Proportional to 18,100.82, 24,978.84 and 10,143

Step by Step Solution

1. Step 1: Write the proportion equation
   18,100.82 : 24,978.84 = 10,143 : x
2. Step 2: Convert to fraction form
   18,100.82/24,978.84 = 10,143/x
3. Step 3: Cross multiply
   18,100.82x = 24,978.84 × 10,143
4. Step 4: Simplify right side
   18,100.82x = 253,360,374.12
5. Step 5: Solve for x
   x = 253,360,374.12/18,100.82
6. Step 6: Final answer
   x = 13,997.18