Finding the Fourth Proportional to 8,411.70, 12,603.71 and 5,114.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.70 : 12,603.71 = 5,114.87 : x
2. Step 2: Convert to fraction form
   8,411.70/12,603.71 = 5,114.87/x
3. Step 3: Cross multiply
   8,411.70x = 12,603.71 × 5,114.87
4. Step 4: Simplify right side
   8,411.70x = 64,466,287.94
5. Step 5: Solve for x
   x = 64,466,287.94/8,411.70
6. Step 6: Final answer
   x = 7,663.88