Finding the Fourth Proportional to 22,786.56, 31,498.56 and 21,856.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,786.56 : 31,498.56 = 21,856.32 : x
2. Step 2: Convert to fraction form
   22,786.56/31,498.56 = 21,856.32/x
3. Step 3: Cross multiply
   22,786.56x = 31,498.56 × 21,856.32
4. Step 4: Simplify right side
   22,786.56x = 688,442,606.90
5. Step 5: Solve for x
   x = 688,442,606.90/22,786.56
6. Step 6: Final answer
   x = 30,212.66