Finding the Fourth Proportional to 10,971.14, 16,435.98 and 5,418

Step by Step Solution

1. Step 1: Write the proportion equation
   10,971.14 : 16,435.98 = 5,418 : x
2. Step 2: Convert to fraction form
   10,971.14/16,435.98 = 5,418/x
3. Step 3: Cross multiply
   10,971.14x = 16,435.98 × 5,418
4. Step 4: Simplify right side
   10,971.14x = 89,050,139.64
5. Step 5: Solve for x
   x = 89,050,139.64/10,971.14
6. Step 6: Final answer
   x = 8,116.77