Finding the Fourth Proportional to 1,123, 1,549.98 and 709.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123 : 1,549.98 = 709.24 : x
2. Step 2: Convert to fraction form
   1,123/1,549.98 = 709.24/x
3. Step 3: Cross multiply
   1,123x = 1,549.98 × 709.24
4. Step 4: Simplify right side
   1,123x = 1,099,307.82
5. Step 5: Solve for x
   x = 1,099,307.82/1,123
6. Step 6: Final answer
   x = 978.90