Finding the Fourth Proportional to 235,496.18, 324,870.42 and 139,935.20

Step by Step Solution

1. Step 1: Write the proportion equation
   235,496.18 : 324,870.42 = 139,935.20 : x
2. Step 2: Convert to fraction form
   235,496.18/324,870.42 = 139,935.20/x
3. Step 3: Cross multiply
   235,496.18x = 324,870.42 × 139,935.20
4. Step 4: Simplify right side
   235,496.18x = 45,460,807,196.78
5. Step 5: Solve for x
   x = 45,460,807,196.78/235,496.18
6. Step 6: Final answer
   x = 193,042.65