Finding the Fourth Proportional to 9,123.26, 12,564.91 and 7,863.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.26 : 12,564.91 = 7,863.84 : x
2. Step 2: Convert to fraction form
   9,123.26/12,564.91 = 7,863.84/x
3. Step 3: Cross multiply
   9,123.26x = 12,564.91 × 7,863.84
4. Step 4: Simplify right side
   9,123.26x = 98,808,441.85
5. Step 5: Solve for x
   x = 98,808,441.85/9,123.26
6. Step 6: Final answer
   x = 10,830.39