Finding the Fourth Proportional to 1,124.59, 1,685.56 and 507.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.59 : 1,685.56 = 507.57 : x
2. Step 2: Convert to fraction form
   1,124.59/1,685.56 = 507.57/x
3. Step 3: Cross multiply
   1,124.59x = 1,685.56 × 507.57
4. Step 4: Simplify right side
   1,124.59x = 855,539.69
5. Step 5: Solve for x
   x = 855,539.69/1,124.59
6. Step 6: Final answer
   x = 760.76