Finding the Fourth Proportional to 12,188.02, 18,279.43 and 3,868.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,188.02 : 18,279.43 = 3,868.78 : x
2. Step 2: Convert to fraction form
   12,188.02/18,279.43 = 3,868.78/x
3. Step 3: Cross multiply
   12,188.02x = 18,279.43 × 3,868.78
4. Step 4: Simplify right side
   12,188.02x = 70,719,093.20
5. Step 5: Solve for x
   x = 70,719,093.20/12,188.02
6. Step 6: Final answer
   x = 5,802.34