Finding the Fourth Proportional to 12,939.29, 19,417.91 and 5,920.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,939.29 : 19,417.91 = 5,920.16 : x
2. Step 2: Convert to fraction form
   12,939.29/19,417.91 = 5,920.16/x
3. Step 3: Cross multiply
   12,939.29x = 19,417.91 × 5,920.16
4. Step 4: Simplify right side
   12,939.29x = 114,957,153.01
5. Step 5: Solve for x
   x = 114,957,153.01/12,939.29
6. Step 6: Final answer
   x = 8,884.35