Finding the Fourth Proportional to 21,156.26, 31,731.86 and 5,575.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,156.26 : 31,731.86 = 5,575.10 : x
2. Step 2: Convert to fraction form
   21,156.26/31,731.86 = 5,575.10/x
3. Step 3: Cross multiply
   21,156.26x = 31,731.86 × 5,575.10
4. Step 4: Simplify right side
   21,156.26x = 176,908,292.69
5. Step 5: Solve for x
   x = 176,908,292.69/21,156.26
6. Step 6: Final answer
   x = 8,361.98