Finding the Fourth Proportional to 21,111.32, 31,666.92 and 6,320.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.32 : 31,666.92 = 6,320.24 : x
2. Step 2: Convert to fraction form
   21,111.32/31,666.92 = 6,320.24/x
3. Step 3: Cross multiply
   21,111.32x = 31,666.92 × 6,320.24
4. Step 4: Simplify right side
   21,111.32x = 200,142,534.46
5. Step 5: Solve for x
   x = 200,142,534.46/21,111.32
6. Step 6: Final answer
   x = 9,480.34