Finding the Fourth Proportional to 22,925.76, 31,638.72 and 12,856.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,925.76 : 31,638.72 = 12,856.32 : x
2. Step 2: Convert to fraction form
   22,925.76/31,638.72 = 12,856.32/x
3. Step 3: Cross multiply
   22,925.76x = 31,638.72 × 12,856.32
4. Step 4: Simplify right side
   22,925.76x = 406,757,508.71
5. Step 5: Solve for x
   x = 406,757,508.71/22,925.76
6. Step 6: Final answer
   x = 17,742.38