Finding the Fourth Proportional to 1,377.42, 1,900.47 and 818.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.42 : 1,900.47 = 818.01 : x
2. Step 2: Convert to fraction form
   1,377.42/1,900.47 = 818.01/x
3. Step 3: Cross multiply
   1,377.42x = 1,900.47 × 818.01
4. Step 4: Simplify right side
   1,377.42x = 1,554,603.46
5. Step 5: Solve for x
   x = 1,554,603.46/1,377.42
6. Step 6: Final answer
   x = 1,128.63