Finding the Fourth Proportional to 1,433.31, 2,150.33 and 407.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.31 : 2,150.33 = 407.31 : x
2. Step 2: Convert to fraction form
   1,433.31/2,150.33 = 407.31/x
3. Step 3: Cross multiply
   1,433.31x = 2,150.33 × 407.31
4. Step 4: Simplify right side
   1,433.31x = 875,856.29
5. Step 5: Solve for x
   x = 875,856.29/1,433.31
6. Step 6: Final answer
   x = 611.07