Finding the Fourth Proportional to 1,315.45, 1,972.03 and 493.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.45 : 1,972.03 = 493.50 : x
2. Step 2: Convert to fraction form
   1,315.45/1,972.03 = 493.50/x
3. Step 3: Cross multiply
   1,315.45x = 1,972.03 × 493.50
4. Step 4: Simplify right side
   1,315.45x = 973,196.81
5. Step 5: Solve for x
   x = 973,196.81/1,315.45
6. Step 6: Final answer
   x = 739.82