Finding the Fourth Proportional to 1,328.52, 1,992.72 and 507.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.52 : 1,992.72 = 507.18 : x
2. Step 2: Convert to fraction form
   1,328.52/1,992.72 = 507.18/x
3. Step 3: Cross multiply
   1,328.52x = 1,992.72 × 507.18
4. Step 4: Simplify right side
   1,328.52x = 1,010,667.73
5. Step 5: Solve for x
   x = 1,010,667.73/1,328.52
6. Step 6: Final answer
   x = 760.75