Finding the Fourth Proportional to 22,860.86, 31,548.76 and 12,789.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,860.86 : 31,548.76 = 12,789.72 : x
2. Step 2: Convert to fraction form
   22,860.86/31,548.76 = 12,789.72/x
3. Step 3: Cross multiply
   22,860.86x = 31,548.76 × 12,789.72
4. Step 4: Simplify right side
   22,860.86x = 403,499,774.77
5. Step 5: Solve for x
   x = 403,499,774.77/22,860.86
6. Step 6: Final answer
   x = 17,650.25