Finding the Fourth Proportional to 1,377.95, 1,901.61 and 818.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.95 : 1,901.61 = 818.37 : x
2. Step 2: Convert to fraction form
   1,377.95/1,901.61 = 818.37/x
3. Step 3: Cross multiply
   1,377.95x = 1,901.61 × 818.37
4. Step 4: Simplify right side
   1,377.95x = 1,556,220.58
5. Step 5: Solve for x
   x = 1,556,220.58/1,377.95
6. Step 6: Final answer
   x = 1,129.38