Finding the Fourth Proportional to 21,108.30, 31,649.88 and 7,064.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,108.30 : 31,649.88 = 7,064.92 : x
2. Step 2: Convert to fraction form
   21,108.30/31,649.88 = 7,064.92/x
3. Step 3: Cross multiply
   21,108.30x = 31,649.88 × 7,064.92
4. Step 4: Simplify right side
   21,108.30x = 223,603,870.21
5. Step 5: Solve for x
   x = 223,603,870.21/21,108.30
6. Step 6: Final answer
   x = 10,593.17