Finding the Fourth Proportional to 21,434.27, 32,150.16 and 6,642.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,434.27 : 32,150.16 = 6,642.72 : x
2. Step 2: Convert to fraction form
   21,434.27/32,150.16 = 6,642.72/x
3. Step 3: Cross multiply
   21,434.27x = 32,150.16 × 6,642.72
4. Step 4: Simplify right side
   21,434.27x = 213,564,510.84
5. Step 5: Solve for x
   x = 213,564,510.84/21,434.27
6. Step 6: Final answer
   x = 9,963.70