Finding the Fourth Proportional to 12,085.56, 18,123.42 and 3,762.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.56 : 18,123.42 = 3,762.78 : x
2. Step 2: Convert to fraction form
   12,085.56/18,123.42 = 3,762.78/x
3. Step 3: Cross multiply
   12,085.56x = 18,123.42 × 3,762.78
4. Step 4: Simplify right side
   12,085.56x = 68,194,442.31
5. Step 5: Solve for x
   x = 68,194,442.31/12,085.56
6. Step 6: Final answer
   x = 5,642.64