Finding the Fourth Proportional to 1,985.69, 2,740.38 and 1,146.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.69 : 2,740.38 = 1,146.55 : x
2. Step 2: Convert to fraction form
   1,985.69/2,740.38 = 1,146.55/x
3. Step 3: Cross multiply
   1,985.69x = 2,740.38 × 1,146.55
4. Step 4: Simplify right side
   1,985.69x = 3,141,982.69
5. Step 5: Solve for x
   x = 3,141,982.69/1,985.69
6. Step 6: Final answer
   x = 1,582.31