Finding the Fourth Proportional to 9,114.12, 12,545.82 and 7,859.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,114.12 : 12,545.82 = 7,859.30 : x
2. Step 2: Convert to fraction form
   9,114.12/12,545.82 = 7,859.30/x
3. Step 3: Cross multiply
   9,114.12x = 12,545.82 × 7,859.30
4. Step 4: Simplify right side
   9,114.12x = 98,601,300.40
5. Step 5: Solve for x
   x = 98,601,300.40/9,114.12
6. Step 6: Final answer
   x = 10,818.52