Finding the Fourth Proportional to 1,377.76, 1,901.18 and 818.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.76 : 1,901.18 = 818.08 : x
2. Step 2: Convert to fraction form
   1,377.76/1,901.18 = 818.08/x
3. Step 3: Cross multiply
   1,377.76x = 1,901.18 × 818.08
4. Step 4: Simplify right side
   1,377.76x = 1,555,317.33
5. Step 5: Solve for x
   x = 1,555,317.33/1,377.76
6. Step 6: Final answer
   x = 1,128.87