Finding the Fourth Proportional to 12,447.01, 18,670.50 and 5,779.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,447.01 : 18,670.50 = 5,779.86 : x
2. Step 2: Convert to fraction form
   12,447.01/18,670.50 = 5,779.86/x
3. Step 3: Cross multiply
   12,447.01x = 18,670.50 × 5,779.86
4. Step 4: Simplify right side
   12,447.01x = 107,912,850.89
5. Step 5: Solve for x
   x = 107,912,850.89/12,447.01
6. Step 6: Final answer
   x = 8,669.78