Finding the Fourth Proportional to 22,678.88, 31,297.66 and 12,470.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,678.88 : 31,297.66 = 12,470.69 : x
2. Step 2: Convert to fraction form
   22,678.88/31,297.66 = 12,470.69/x
3. Step 3: Cross multiply
   22,678.88x = 31,297.66 × 12,470.69
4. Step 4: Simplify right side
   22,678.88x = 390,303,386.32
5. Step 5: Solve for x
   x = 390,303,386.32/22,678.88
6. Step 6: Final answer
   x = 17,209.99