Finding the Third Proportional to 554 and 1,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   554 : 1,158.50 = 1,158.50 : x
2. Step 2: Convert to fraction form
   554/1,158.50 = 1,158.50/x
3. Step 3: Cross multiply
   554x = 1,158.50 × 1,158.50
4. Step 4: Simplify right side
   554x = 1,342,122.25
5. Step 5: Solve for x
   x = 1,342,122.25/554
6. Step 6: Final answer
   x = 2,422.60