Finding the Fourth Proportional to 9,072.76, 12,520.80 and 5,714.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.76 : 12,520.80 = 5,714.30 : x
2. Step 2: Convert to fraction form
   9,072.76/12,520.80 = 5,714.30/x
3. Step 3: Cross multiply
   9,072.76x = 12,520.80 × 5,714.30
4. Step 4: Simplify right side
   9,072.76x = 71,547,607.44
5. Step 5: Solve for x
   x = 71,547,607.44/9,072.76
6. Step 6: Final answer
   x = 7,885.98