Finding the Fourth Proportional to 154,096.50, 212,653.17 and 83,440.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,096.50 : 212,653.17 = 83,440.50 : x
2. Step 2: Convert to fraction form
   154,096.50/212,653.17 = 83,440.50/x
3. Step 3: Cross multiply
   154,096.50x = 212,653.17 × 83,440.50
4. Step 4: Simplify right side
   154,096.50x = 17,743,886,831.39
5. Step 5: Solve for x
   x = 17,743,886,831.39/154,096.50
6. Step 6: Final answer
   x = 115,147.89