Finding the Fourth Proportional to 12,437.78, 17,157.33 and 8,654.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,437.78 : 17,157.33 = 8,654.96 : x
2. Step 2: Convert to fraction form
   12,437.78/17,157.33 = 8,654.96/x
3. Step 3: Cross multiply
   12,437.78x = 17,157.33 × 8,654.96
4. Step 4: Simplify right side
   12,437.78x = 148,496,004.86
5. Step 5: Solve for x
   x = 148,496,004.86/12,437.78
6. Step 6: Final answer
   x = 11,939.11