Finding the Fourth Proportional to 1,986.10, 2,737.52 and 1,395.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.10 : 2,737.52 = 1,395.61 : x
2. Step 2: Convert to fraction form
   1,986.10/2,737.52 = 1,395.61/x
3. Step 3: Cross multiply
   1,986.10x = 2,737.52 × 1,395.61
4. Step 4: Simplify right side
   1,986.10x = 3,820,503.31
5. Step 5: Solve for x
   x = 3,820,503.31/1,986.10
6. Step 6: Final answer
   x = 1,923.62