Finding the Fourth Proportional to 1,123.32, 1,681.55 and 979.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.32 : 1,681.55 = 979.32 : x
2. Step 2: Convert to fraction form
   1,123.32/1,681.55 = 979.32/x
3. Step 3: Cross multiply
   1,123.32x = 1,681.55 × 979.32
4. Step 4: Simplify right side
   1,123.32x = 1,646,775.55
5. Step 5: Solve for x
   x = 1,646,775.55/1,123.32
6. Step 6: Final answer
   x = 1,465.99