Finding the Fourth Proportional to 1,626.82, 2,245.01 and 880.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,626.82 : 2,245.01 = 880.78 : x
2. Step 2: Convert to fraction form
   1,626.82/2,245.01 = 880.78/x
3. Step 3: Cross multiply
   1,626.82x = 2,245.01 × 880.78
4. Step 4: Simplify right side
   1,626.82x = 1,977,356.50
5. Step 5: Solve for x
   x = 1,977,356.50/1,626.82
6. Step 6: Final answer
   x = 1,215.48