Finding the Fourth Proportional to 234,870.81, 324,205.77 and 139,377.50

Step by Step Solution

1. Step 1: Write the proportion equation
   234,870.81 : 324,205.77 = 139,377.50 : x
2. Step 2: Convert to fraction form
   234,870.81/324,205.77 = 139,377.50/x
3. Step 3: Cross multiply
   234,870.81x = 324,205.77 × 139,377.50
4. Step 4: Simplify right side
   234,870.81x = 45,186,988,087.15
5. Step 5: Solve for x
   x = 45,186,988,087.15/234,870.81
6. Step 6: Final answer
   x = 192,390.82