Finding the Fourth Proportional to 1,611.99, 2,224.59 and 1,140.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.99 : 2,224.59 = 1,140.72 : x
2. Step 2: Convert to fraction form
   1,611.99/2,224.59 = 1,140.72/x
3. Step 3: Cross multiply
   1,611.99x = 2,224.59 × 1,140.72
4. Step 4: Simplify right side
   1,611.99x = 2,537,634.30
5. Step 5: Solve for x
   x = 2,537,634.30/1,611.99
6. Step 6: Final answer
   x = 1,574.22