Finding the Fourth Proportional to 1,377.94, 1,901.57 and 818.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.94 : 1,901.57 = 818.43 : x
2. Step 2: Convert to fraction form
   1,377.94/1,901.57 = 818.43/x
3. Step 3: Cross multiply
   1,377.94x = 1,901.57 × 818.43
4. Step 4: Simplify right side
   1,377.94x = 1,556,301.94
5. Step 5: Solve for x
   x = 1,556,301.94/1,377.94
6. Step 6: Final answer
   x = 1,129.44