Finding the Fourth Proportional to 1,377.32, 1,900.70 and 818.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.32 : 1,900.70 = 818.06 : x
2. Step 2: Convert to fraction form
   1,377.32/1,900.70 = 818.06/x
3. Step 3: Cross multiply
   1,377.32x = 1,900.70 × 818.06
4. Step 4: Simplify right side
   1,377.32x = 1,554,890.37
5. Step 5: Solve for x
   x = 1,554,890.37/1,377.32
6. Step 6: Final answer
   x = 1,128.93