Finding the Fourth Proportional to 1,806.38, 2,492.04 and 1,215.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.38 : 2,492.04 = 1,215.89 : x
2. Step 2: Convert to fraction form
   1,806.38/2,492.04 = 1,215.89/x
3. Step 3: Cross multiply
   1,806.38x = 2,492.04 × 1,215.89
4. Step 4: Simplify right side
   1,806.38x = 3,030,047.96
5. Step 5: Solve for x
   x = 3,030,047.96/1,806.38
6. Step 6: Final answer
   x = 1,677.42