Finding the Fourth Proportional to 6,651.18, 9,979.71 and 3,487.86

Step by Step Solution

1. Step 1: Write the proportion equation
   6,651.18 : 9,979.71 = 3,487.86 : x
2. Step 2: Convert to fraction form
   6,651.18/9,979.71 = 3,487.86/x
3. Step 3: Cross multiply
   6,651.18x = 9,979.71 × 3,487.86
4. Step 4: Simplify right side
   6,651.18x = 34,807,813.88
5. Step 5: Solve for x
   x = 34,807,813.88/6,651.18
6. Step 6: Final answer
   x = 5,233.33