Finding the Fourth Proportional to 1,127.97, 1,690.86 and 434.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.97 : 1,690.86 = 434.10 : x
2. Step 2: Convert to fraction form
   1,127.97/1,690.86 = 434.10/x
3. Step 3: Cross multiply
   1,127.97x = 1,690.86 × 434.10
4. Step 4: Simplify right side
   1,127.97x = 734,002.33
5. Step 5: Solve for x
   x = 734,002.33/1,127.97
6. Step 6: Final answer
   x = 650.73