Finding the Fourth Proportional to 12,139.86, 18,195.60 and 5,566.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.86 : 18,195.60 = 5,566.70 : x
2. Step 2: Convert to fraction form
   12,139.86/18,195.60 = 5,566.70/x
3. Step 3: Cross multiply
   12,139.86x = 18,195.60 × 5,566.70
4. Step 4: Simplify right side
   12,139.86x = 101,289,446.52
5. Step 5: Solve for x
   x = 101,289,446.52/12,139.86
6. Step 6: Final answer
   x = 8,343.54