Finding the Fourth Proportional to 1,144.18, 1,715.91 and 374.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.18 : 1,715.91 = 374.50 : x
2. Step 2: Convert to fraction form
   1,144.18/1,715.91 = 374.50/x
3. Step 3: Cross multiply
   1,144.18x = 1,715.91 × 374.50
4. Step 4: Simplify right side
   1,144.18x = 642,608.30
5. Step 5: Solve for x
   x = 642,608.30/1,144.18
6. Step 6: Final answer
   x = 561.63