Finding the Fourth Proportional to 154,099.50, 212,657.31 and 83,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,099.50 : 212,657.31 = 83,443.50 : x
2. Step 2: Convert to fraction form
   154,099.50/212,657.31 = 83,443.50/x
3. Step 3: Cross multiply
   154,099.50x = 212,657.31 × 83,443.50
4. Step 4: Simplify right side
   154,099.50x = 17,744,870,246.99
5. Step 5: Solve for x
   x = 17,744,870,246.99/154,099.50
6. Step 6: Final answer
   x = 115,152.03