Finding the Fourth Proportional to 1,021.32, 1,534.34 and 979.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021.32 : 1,534.34 = 979.82 : x
2. Step 2: Convert to fraction form
   1,021.32/1,534.34 = 979.82/x
3. Step 3: Cross multiply
   1,021.32x = 1,534.34 × 979.82
4. Step 4: Simplify right side
   1,021.32x = 1,503,377.02
5. Step 5: Solve for x
   x = 1,503,377.02/1,021.32
6. Step 6: Final answer
   x = 1,471.99