Finding the Fourth Proportional to 8,085.60, 12,123.42 and 3,149.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.60 : 12,123.42 = 3,149.49 : x
2. Step 2: Convert to fraction form
   8,085.60/12,123.42 = 3,149.49/x
3. Step 3: Cross multiply
   8,085.60x = 12,123.42 × 3,149.49
4. Step 4: Simplify right side
   8,085.60x = 38,182,590.06
5. Step 5: Solve for x
   x = 38,182,590.06/8,085.60
6. Step 6: Final answer
   x = 4,722.30