Finding the Fourth Proportional to 9,363.90, 12,920.94 and 7,868.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,363.90 : 12,920.94 = 7,868.10 : x
2. Step 2: Convert to fraction form
   9,363.90/12,920.94 = 7,868.10/x
3. Step 3: Cross multiply
   9,363.90x = 12,920.94 × 7,868.10
4. Step 4: Simplify right side
   9,363.90x = 101,663,248.01
5. Step 5: Solve for x
   x = 101,663,248.01/9,363.90
6. Step 6: Final answer
   x = 10,856.93