Finding the Fourth Proportional to 1,377.47, 1,900.94 and 817.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.47 : 1,900.94 = 817.94 : x
2. Step 2: Convert to fraction form
   1,377.47/1,900.94 = 817.94/x
3. Step 3: Cross multiply
   1,377.47x = 1,900.94 × 817.94
4. Step 4: Simplify right side
   1,377.47x = 1,554,859.62
5. Step 5: Solve for x
   x = 1,554,859.62/1,377.47
6. Step 6: Final answer
   x = 1,128.78