Finding the Fourth Proportional to 16,881.32, 25,294.21 and 5,781.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,881.32 : 25,294.21 = 5,781.89 : x
2. Step 2: Convert to fraction form
   16,881.32/25,294.21 = 5,781.89/x
3. Step 3: Cross multiply
   16,881.32x = 25,294.21 × 5,781.89
4. Step 4: Simplify right side
   16,881.32x = 146,248,339.86
5. Step 5: Solve for x
   x = 146,248,339.86/16,881.32
6. Step 6: Final answer
   x = 8,663.32