Finding the Fourth Proportional to 1,643.32, 2,267.94 and 980.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.32 : 2,267.94 = 980.38 : x
2. Step 2: Convert to fraction form
   1,643.32/2,267.94 = 980.38/x
3. Step 3: Cross multiply
   1,643.32x = 2,267.94 × 980.38
4. Step 4: Simplify right side
   1,643.32x = 2,223,443.02
5. Step 5: Solve for x
   x = 2,223,443.02/1,643.32
6. Step 6: Final answer
   x = 1,353.02