Finding the Fourth Proportional to 1,377.96, 1,901.52 and 818.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.96 : 1,901.52 = 818.79 : x
2. Step 2: Convert to fraction form
   1,377.96/1,901.52 = 818.79/x
3. Step 3: Cross multiply
   1,377.96x = 1,901.52 × 818.79
4. Step 4: Simplify right side
   1,377.96x = 1,556,945.56
5. Step 5: Solve for x
   x = 1,556,945.56/1,377.96
6. Step 6: Final answer
   x = 1,129.89