Finding the Fourth Proportional to 1,890.72, 2,608.24 and 1,104.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.72 : 2,608.24 = 1,104.60 : x
2. Step 2: Convert to fraction form
   1,890.72/2,608.24 = 1,104.60/x
3. Step 3: Cross multiply
   1,890.72x = 2,608.24 × 1,104.60
4. Step 4: Simplify right side
   1,890.72x = 2,881,061.90
5. Step 5: Solve for x
   x = 2,881,061.90/1,890.72
6. Step 6: Final answer
   x = 1,523.79