Finding the Fourth Proportional to 1,509.99, 2,083.89 and 880.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,509.99 : 2,083.89 = 880.57 : x
2. Step 2: Convert to fraction form
   1,509.99/2,083.89 = 880.57/x
3. Step 3: Cross multiply
   1,509.99x = 2,083.89 × 880.57
4. Step 4: Simplify right side
   1,509.99x = 1,835,011.02
5. Step 5: Solve for x
   x = 1,835,011.02/1,509.99
6. Step 6: Final answer
   x = 1,215.25