Finding the Fourth Proportional to 21,223.68, 31,836.12 and 5,641.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,223.68 : 31,836.12 = 5,641.32 : x
2. Step 2: Convert to fraction form
   21,223.68/31,836.12 = 5,641.32/x
3. Step 3: Cross multiply
   21,223.68x = 31,836.12 × 5,641.32
4. Step 4: Simplify right side
   21,223.68x = 179,597,740.48
5. Step 5: Solve for x
   x = 179,597,740.48/21,223.68
6. Step 6: Final answer
   x = 8,462.14