Finding the Fourth Proportional to 235,142.82, 324,487.89 and 139,647.06

Step by Step Solution

1. Step 1: Write the proportion equation
   235,142.82 : 324,487.89 = 139,647.06 : x
2. Step 2: Convert to fraction form
   235,142.82/324,487.89 = 139,647.06/x
3. Step 3: Cross multiply
   235,142.82x = 324,487.89 × 139,647.06
4. Step 4: Simplify right side
   235,142.82x = 45,313,779,844.10
5. Step 5: Solve for x
   x = 45,313,779,844.10/235,142.82
6. Step 6: Final answer
   x = 192,707.48