Finding the Fourth Proportional to 1,376.81, 1,899.54 and 817.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.81 : 1,899.54 = 817.46 : x
2. Step 2: Convert to fraction form
   1,376.81/1,899.54 = 817.46/x
3. Step 3: Cross multiply
   1,376.81x = 1,899.54 × 817.46
4. Step 4: Simplify right side
   1,376.81x = 1,552,802.72
5. Step 5: Solve for x
   x = 1,552,802.72/1,376.81
6. Step 6: Final answer
   x = 1,127.82