Finding the Fourth Proportional to 8,915.22, 12,304.44 and 5,780.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,915.22 : 12,304.44 = 5,780.52 : x
2. Step 2: Convert to fraction form
   8,915.22/12,304.44 = 5,780.52/x
3. Step 3: Cross multiply
   8,915.22x = 12,304.44 × 5,780.52
4. Step 4: Simplify right side
   8,915.22x = 71,126,061.51
5. Step 5: Solve for x
   x = 71,126,061.51/8,915.22
6. Step 6: Final answer
   x = 7,978.05