Finding the Fourth Proportional to 1,376.72, 1,899.75 and 817.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.72 : 1,899.75 = 817.10 : x
2. Step 2: Convert to fraction form
   1,376.72/1,899.75 = 817.10/x
3. Step 3: Cross multiply
   1,376.72x = 1,899.75 × 817.10
4. Step 4: Simplify right side
   1,376.72x = 1,552,285.73
5. Step 5: Solve for x
   x = 1,552,285.73/1,376.72
6. Step 6: Final answer
   x = 1,127.52