Finding the Fourth Proportional to 1,325.31, 1,986.63 and 503.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,325.31 : 1,986.63 = 503.37 : x
2. Step 2: Convert to fraction form
   1,325.31/1,986.63 = 503.37/x
3. Step 3: Cross multiply
   1,325.31x = 1,986.63 × 503.37
4. Step 4: Simplify right side
   1,325.31x = 1,000,009.94
5. Step 5: Solve for x
   x = 1,000,009.94/1,325.31
6. Step 6: Final answer
   x = 754.55