Finding the Fourth Proportional to 1,123.73, 1,685.59 and 507.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.73 : 1,685.59 = 507.32 : x
2. Step 2: Convert to fraction form
   1,123.73/1,685.59 = 507.32/x
3. Step 3: Cross multiply
   1,123.73x = 1,685.59 × 507.32
4. Step 4: Simplify right side
   1,123.73x = 855,133.52
5. Step 5: Solve for x
   x = 855,133.52/1,123.73
6. Step 6: Final answer
   x = 760.98