Finding the Fourth Proportional to 1,131.59, 1,696.43 and 515.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.59 : 1,696.43 = 515.08 : x
2. Step 2: Convert to fraction form
   1,131.59/1,696.43 = 515.08/x
3. Step 3: Cross multiply
   1,131.59x = 1,696.43 × 515.08
4. Step 4: Simplify right side
   1,131.59x = 873,794.59
5. Step 5: Solve for x
   x = 873,794.59/1,131.59
6. Step 6: Final answer
   x = 772.18