Finding the Fourth Proportional to 102,912.83, 154,123.20 and 83,229.83

Step by Step Solution

1. Step 1: Write the proportion equation
   102,912.83 : 154,123.20 = 83,229.83 : x
2. Step 2: Convert to fraction form
   102,912.83/154,123.20 = 83,229.83/x
3. Step 3: Cross multiply
   102,912.83x = 154,123.20 × 83,229.83
4. Step 4: Simplify right side
   102,912.83x = 12,827,646,964.44
5. Step 5: Solve for x
   x = 12,827,646,964.44/102,912.83
6. Step 6: Final answer
   x = 124,645.76