Finding the Fourth Proportional to 22,510.51, 31,064.38 and 12,439.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,510.51 : 31,064.38 = 12,439.65 : x
2. Step 2: Convert to fraction form
   22,510.51/31,064.38 = 12,439.65/x
3. Step 3: Cross multiply
   22,510.51x = 31,064.38 × 12,439.65
4. Step 4: Simplify right side
   22,510.51x = 386,430,014.67
5. Step 5: Solve for x
   x = 386,430,014.67/22,510.51
6. Step 6: Final answer
   x = 17,166.65