Finding the Fourth Proportional to 154,601.62, 231,435.60 and 139,817.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,601.62 : 231,435.60 = 139,817.50 : x
2. Step 2: Convert to fraction form
   154,601.62/231,435.60 = 139,817.50/x
3. Step 3: Cross multiply
   154,601.62x = 231,435.60 × 139,817.50
4. Step 4: Simplify right side
   154,601.62x = 32,358,745,900.10
5. Step 5: Solve for x
   x = 32,358,745,900.10/154,601.62
6. Step 6: Final answer
   x = 209,304.06