Finding the Fourth Proportional to 1,820.34, 2,505.78 and 1,377.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.34 : 2,505.78 = 1,377.18 : x
2. Step 2: Convert to fraction form
   1,820.34/2,505.78 = 1,377.18/x
3. Step 3: Cross multiply
   1,820.34x = 2,505.78 × 1,377.18
4. Step 4: Simplify right side
   1,820.34x = 3,450,910.10
5. Step 5: Solve for x
   x = 3,450,910.10/1,820.34
6. Step 6: Final answer
   x = 1,895.75