Finding the Fourth Proportional to 8,915.48, 12,307.82 and 5,774.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,915.48 : 12,307.82 = 5,774.20 : x
2. Step 2: Convert to fraction form
   8,915.48/12,307.82 = 5,774.20/x
3. Step 3: Cross multiply
   8,915.48x = 12,307.82 × 5,774.20
4. Step 4: Simplify right side
   8,915.48x = 71,067,814.24
5. Step 5: Solve for x
   x = 71,067,814.24/8,915.48
6. Step 6: Final answer
   x = 7,971.28