Finding the Fourth Proportional to 1,385.96, 1,900.21 and 1,361.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.96 : 1,900.21 = 1,361.36 : x
2. Step 2: Convert to fraction form
   1,385.96/1,900.21 = 1,361.36/x
3. Step 3: Cross multiply
   1,385.96x = 1,900.21 × 1,361.36
4. Step 4: Simplify right side
   1,385.96x = 2,586,869.89
5. Step 5: Solve for x
   x = 2,586,869.89/1,385.96
6. Step 6: Final answer
   x = 1,866.48