Finding the Fourth Proportional to 1,985.55, 2,740.56 and 1,396.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.55 : 2,740.56 = 1,396.29 : x
2. Step 2: Convert to fraction form
   1,985.55/2,740.56 = 1,396.29/x
3. Step 3: Cross multiply
   1,985.55x = 2,740.56 × 1,396.29
4. Step 4: Simplify right side
   1,985.55x = 3,826,616.52
5. Step 5: Solve for x
   x = 3,826,616.52/1,985.55
6. Step 6: Final answer
   x = 1,927.23