Finding the Fourth Proportional to 9,639.84, 14,448.72 and 4,085.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,639.84 : 14,448.72 = 4,085.04 : x
2. Step 2: Convert to fraction form
   9,639.84/14,448.72 = 4,085.04/x
3. Step 3: Cross multiply
   9,639.84x = 14,448.72 × 4,085.04
4. Step 4: Simplify right side
   9,639.84x = 59,023,599.15
5. Step 5: Solve for x
   x = 59,023,599.15/9,639.84
6. Step 6: Final answer
   x = 6,122.88