Finding the Fourth Proportional to 1,123.26, 1,685.69 and 507.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.26 : 1,685.69 = 507.05 : x
2. Step 2: Convert to fraction form
   1,123.26/1,685.69 = 507.05/x
3. Step 3: Cross multiply
   1,123.26x = 1,685.69 × 507.05
4. Step 4: Simplify right side
   1,123.26x = 854,729.11
5. Step 5: Solve for x
   x = 854,729.11/1,123.26
6. Step 6: Final answer
   x = 760.94