Finding the Fourth Proportional to 1,513.24, 2,270.12 and 691.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.24 : 2,270.12 = 691.59 : x
2. Step 2: Convert to fraction form
   1,513.24/2,270.12 = 691.59/x
3. Step 3: Cross multiply
   1,513.24x = 2,270.12 × 691.59
4. Step 4: Simplify right side
   1,513.24x = 1,570,002.53
5. Step 5: Solve for x
   x = 1,570,002.53/1,513.24
6. Step 6: Final answer
   x = 1,037.51