Finding the Fourth Proportional to 9,915.18, 14,868.72 and 4,293.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.18 : 14,868.72 = 4,293.18 : x
2. Step 2: Convert to fraction form
   9,915.18/14,868.72 = 4,293.18/x
3. Step 3: Cross multiply
   9,915.18x = 14,868.72 × 4,293.18
4. Step 4: Simplify right side
   9,915.18x = 63,834,091.33
5. Step 5: Solve for x
   x = 63,834,091.33/9,915.18
6. Step 6: Final answer
   x = 6,438.02