Finding the Fourth Proportional to 9,279.90, 12,805.56 and 5,088.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.90 : 12,805.56 = 5,088.15 : x
2. Step 2: Convert to fraction form
   9,279.90/12,805.56 = 5,088.15/x
3. Step 3: Cross multiply
   9,279.90x = 12,805.56 × 5,088.15
4. Step 4: Simplify right side
   9,279.90x = 65,156,610.11
5. Step 5: Solve for x
   x = 65,156,610.11/9,279.90
6. Step 6: Final answer
   x = 7,021.26