Finding the Fourth Proportional to 1,377.68, 1,900.56 and 817.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.68 : 1,900.56 = 817.83 : x
2. Step 2: Convert to fraction form
   1,377.68/1,900.56 = 817.83/x
3. Step 3: Cross multiply
   1,377.68x = 1,900.56 × 817.83
4. Step 4: Simplify right side
   1,377.68x = 1,554,334.98
5. Step 5: Solve for x
   x = 1,554,334.98/1,377.68
6. Step 6: Final answer
   x = 1,128.23