Finding the Fourth Proportional to 4,160.48, 6,238.89 and 1,238.20

Step by Step Solution

1. Step 1: Write the proportion equation
   4,160.48 : 6,238.89 = 1,238.20 : x
2. Step 2: Convert to fraction form
   4,160.48/6,238.89 = 1,238.20/x
3. Step 3: Cross multiply
   4,160.48x = 6,238.89 × 1,238.20
4. Step 4: Simplify right side
   4,160.48x = 7,724,978.00
5. Step 5: Solve for x
   x = 7,724,978.00/4,160.48
6. Step 6: Final answer
   x = 1,856.75