Finding the Fourth Proportional to 22,789.68, 31,449.69 and 12,718.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,789.68 : 31,449.69 = 12,718.01 : x
2. Step 2: Convert to fraction form
   22,789.68/31,449.69 = 12,718.01/x
3. Step 3: Cross multiply
   22,789.68x = 31,449.69 × 12,718.01
4. Step 4: Simplify right side
   22,789.68x = 399,977,314.67
5. Step 5: Solve for x
   x = 399,977,314.67/22,789.68
6. Step 6: Final answer
   x = 17,550.81