Finding the Fourth Proportional to 22,856.49, 31,543.56 and 12,785.87

Step by Step Solution

1. Step 1: Write the proportion equation
   22,856.49 : 31,543.56 = 12,785.87 : x
2. Step 2: Convert to fraction form
   22,856.49/31,543.56 = 12,785.87/x
3. Step 3: Cross multiply
   22,856.49x = 31,543.56 × 12,785.87
4. Step 4: Simplify right side
   22,856.49x = 403,311,699.78
5. Step 5: Solve for x
   x = 403,311,699.78/22,856.49
6. Step 6: Final answer
   x = 17,645.39