Finding the Fourth Proportional to 2,171.32, 3,255.63 and 938.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.32 : 3,255.63 = 938.05 : x
2. Step 2: Convert to fraction form
   2,171.32/3,255.63 = 938.05/x
3. Step 3: Cross multiply
   2,171.32x = 3,255.63 × 938.05
4. Step 4: Simplify right side
   2,171.32x = 3,053,943.72
5. Step 5: Solve for x
   x = 3,053,943.72/2,171.32
6. Step 6: Final answer
   x = 1,406.49