Finding the Fourth Proportional to 9,122.76, 12,564.22 and 7,863.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,122.76 : 12,564.22 = 7,863.34 : x
2. Step 2: Convert to fraction form
   9,122.76/12,564.22 = 7,863.34/x
3. Step 3: Cross multiply
   9,122.76x = 12,564.22 × 7,863.34
4. Step 4: Simplify right side
   9,122.76x = 98,796,733.69
5. Step 5: Solve for x
   x = 98,796,733.69/9,122.76
6. Step 6: Final answer
   x = 10,829.70