Finding the Fourth Proportional to 12,369.32, 17,067.83 and 7,521.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,369.32 : 17,067.83 = 7,521.57 : x
2. Step 2: Convert to fraction form
   12,369.32/17,067.83 = 7,521.57/x
3. Step 3: Cross multiply
   12,369.32x = 17,067.83 × 7,521.57
4. Step 4: Simplify right side
   12,369.32x = 128,376,896.90
5. Step 5: Solve for x
   x = 128,376,896.90/12,369.32
6. Step 6: Final answer
   x = 10,378.66