Finding the Third Proportional to 429.05 and 876.60

Step by Step Solution

1. Step 1: Write the proportion equation
   429.05 : 876.60 = 876.60 : x
2. Step 2: Convert to fraction form
   429.05/876.60 = 876.60/x
3. Step 3: Cross multiply
   429.05x = 876.60 × 876.60
4. Step 4: Simplify right side
   429.05x = 768,433.72
5. Step 5: Solve for x
   x = 768,433.72/429.05
6. Step 6: Final answer
   x = 1,791.03