Finding the Fourth Proportional to 12,158.32, 18,238.20 and 3,838.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,158.32 : 18,238.20 = 3,838.60 : x
2. Step 2: Convert to fraction form
   12,158.32/18,238.20 = 3,838.60/x
3. Step 3: Cross multiply
   12,158.32x = 18,238.20 × 3,838.60
4. Step 4: Simplify right side
   12,158.32x = 70,009,154.52
5. Step 5: Solve for x
   x = 70,009,154.52/12,158.32
6. Step 6: Final answer
   x = 5,758.13