Finding the Fourth Proportional to 9,909.12, 14,854.28 and 3,664.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,909.12 : 14,854.28 = 3,664.89 : x
2. Step 2: Convert to fraction form
   9,909.12/14,854.28 = 3,664.89/x
3. Step 3: Cross multiply
   9,909.12x = 14,854.28 × 3,664.89
4. Step 4: Simplify right side
   9,909.12x = 54,439,283.90
5. Step 5: Solve for x
   x = 54,439,283.90/9,909.12
6. Step 6: Final answer
   x = 5,493.86