Finding the Fourth Proportional to 2,382.78, 3,571.50 and 900.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.78 : 3,571.50 = 900.60 : x
2. Step 2: Convert to fraction form
   2,382.78/3,571.50 = 900.60/x
3. Step 3: Cross multiply
   2,382.78x = 3,571.50 × 900.60
4. Step 4: Simplify right side
   2,382.78x = 3,216,492.90
5. Step 5: Solve for x
   x = 3,216,492.90/2,382.78
6. Step 6: Final answer
   x = 1,349.89