Finding the Fourth Proportional to 22,510.30, 31,064.49 and 12,438.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,510.30 : 31,064.49 = 12,438.64 : x
2. Step 2: Convert to fraction form
   22,510.30/31,064.49 = 12,438.64/x
3. Step 3: Cross multiply
   22,510.30x = 31,064.49 × 12,438.64
4. Step 4: Simplify right side
   22,510.30x = 386,400,007.89
5. Step 5: Solve for x
   x = 386,400,007.89/22,510.30
6. Step 6: Final answer
   x = 17,165.48