Finding the Fourth Proportional to 21,103.47, 31,643.51 and 8,632.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,103.47 : 31,643.51 = 8,632.25 : x
2. Step 2: Convert to fraction form
   21,103.47/31,643.51 = 8,632.25/x
3. Step 3: Cross multiply
   21,103.47x = 31,643.51 × 8,632.25
4. Step 4: Simplify right side
   21,103.47x = 273,154,530.98
5. Step 5: Solve for x
   x = 273,154,530.98/21,103.47
6. Step 6: Final answer
   x = 12,943.59