Finding the Fourth Proportional to 2,123.32, 3,184.39 and 1,505.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.32 : 3,184.39 = 1,505.20 : x
2. Step 2: Convert to fraction form
   2,123.32/3,184.39 = 1,505.20/x
3. Step 3: Cross multiply
   2,123.32x = 3,184.39 × 1,505.20
4. Step 4: Simplify right side
   2,123.32x = 4,793,143.83
5. Step 5: Solve for x
   x = 4,793,143.83/2,123.32
6. Step 6: Final answer
   x = 2,257.38