Finding the Fourth Proportional to 1,038.70, 1,433.31 and 613.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.70 : 1,433.31 = 613.32 : x
2. Step 2: Convert to fraction form
   1,038.70/1,433.31 = 613.32/x
3. Step 3: Cross multiply
   1,038.70x = 1,433.31 × 613.32
4. Step 4: Simplify right side
   1,038.70x = 879,077.69
5. Step 5: Solve for x
   x = 879,077.69/1,038.70
6. Step 6: Final answer
   x = 846.32