Finding the Fourth Proportional to 2,985.40, 4,119.42 and 1,806.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,985.40 : 4,119.42 = 1,806.58 : x
2. Step 2: Convert to fraction form
   2,985.40/4,119.42 = 1,806.58/x
3. Step 3: Cross multiply
   2,985.40x = 4,119.42 × 1,806.58
4. Step 4: Simplify right side
   2,985.40x = 7,442,061.78
5. Step 5: Solve for x
   x = 7,442,061.78/2,985.40
6. Step 6: Final answer
   x = 2,492.82