Finding the Fourth Proportional to 1,492.78, 2,061.09 and 1,045.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.78 : 2,061.09 = 1,045.60 : x
2. Step 2: Convert to fraction form
   1,492.78/2,061.09 = 1,045.60/x
3. Step 3: Cross multiply
   1,492.78x = 2,061.09 × 1,045.60
4. Step 4: Simplify right side
   1,492.78x = 2,155,075.70
5. Step 5: Solve for x
   x = 2,155,075.70/1,492.78
6. Step 6: Final answer
   x = 1,443.67