Finding the Fourth Proportional to 9,643.86, 13,338.27 and 9,152.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,643.86 : 13,338.27 = 9,152.19 : x
2. Step 2: Convert to fraction form
   9,643.86/13,338.27 = 9,152.19/x
3. Step 3: Cross multiply
   9,643.86x = 13,338.27 × 9,152.19
4. Step 4: Simplify right side
   9,643.86x = 122,074,381.31
5. Step 5: Solve for x
   x = 122,074,381.31/9,643.86
6. Step 6: Final answer
   x = 12,658.25