Finding the Fourth Proportional to 9,915.30, 14,868.10 and 4,911.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.30 : 14,868.10 = 4,911.88 : x
2. Step 2: Convert to fraction form
   9,915.30/14,868.10 = 4,911.88/x
3. Step 3: Cross multiply
   9,915.30x = 14,868.10 × 4,911.88
4. Step 4: Simplify right side
   9,915.30x = 73,030,323.03
5. Step 5: Solve for x
   x = 73,030,323.03/9,915.30
6. Step 6: Final answer
   x = 7,365.42