Finding the Fourth Proportional to 12,360.27, 17,043.51 and 9,521.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,360.27 : 17,043.51 = 9,521.34 : x
2. Step 2: Convert to fraction form
   12,360.27/17,043.51 = 9,521.34/x
3. Step 3: Cross multiply
   12,360.27x = 17,043.51 × 9,521.34
4. Step 4: Simplify right side
   12,360.27x = 162,277,053.50
5. Step 5: Solve for x
   x = 162,277,053.50/12,360.27
6. Step 6: Final answer
   x = 13,128.92