Finding the Fourth Proportional to 8,603.31, 12,872.34 and 5,095.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,603.31 : 12,872.34 = 5,095.20 : x
2. Step 2: Convert to fraction form
   8,603.31/12,872.34 = 5,095.20/x
3. Step 3: Cross multiply
   8,603.31x = 12,872.34 × 5,095.20
4. Step 4: Simplify right side
   8,603.31x = 65,587,146.77
5. Step 5: Solve for x
   x = 65,587,146.77/8,603.31
6. Step 6: Final answer
   x = 7,623.48