Finding the Fourth Proportional to 22,559.31, 31,132.28 and 12,487.46

Step by Step Solution

1. Step 1: Write the proportion equation
   22,559.31 : 31,132.28 = 12,487.46 : x
2. Step 2: Convert to fraction form
   22,559.31/31,132.28 = 12,487.46/x
3. Step 3: Cross multiply
   22,559.31x = 31,132.28 × 12,487.46
4. Step 4: Simplify right side
   22,559.31x = 388,763,101.21
5. Step 5: Solve for x
   x = 388,763,101.21/22,559.31
6. Step 6: Final answer
   x = 17,232.94