Finding the Fourth Proportional to 22,784.93, 31,443.10 and 12,712.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,784.93 : 31,443.10 = 12,712.78 : x
2. Step 2: Convert to fraction form
   22,784.93/31,443.10 = 12,712.78/x
3. Step 3: Cross multiply
   22,784.93x = 31,443.10 × 12,712.78
4. Step 4: Simplify right side
   22,784.93x = 399,729,212.82
5. Step 5: Solve for x
   x = 399,729,212.82/22,784.93
6. Step 6: Final answer
   x = 17,543.58