Finding the Fourth Proportional to 2,045.70, 2,821.50 and 1,381.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.70 : 2,821.50 = 1,381.50 : x
2. Step 2: Convert to fraction form
   2,045.70/2,821.50 = 1,381.50/x
3. Step 3: Cross multiply
   2,045.70x = 2,821.50 × 1,381.50
4. Step 4: Simplify right side
   2,045.70x = 3,897,902.25
5. Step 5: Solve for x
   x = 3,897,902.25/2,045.70
6. Step 6: Final answer
   x = 1,905.41