Finding the Fourth Proportional to 1,315.35, 1,973.34 and 493.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.35 : 1,973.34 = 493.61 : x
2. Step 2: Convert to fraction form
   1,315.35/1,973.34 = 493.61/x
3. Step 3: Cross multiply
   1,315.35x = 1,973.34 × 493.61
4. Step 4: Simplify right side
   1,315.35x = 974,050.49
5. Step 5: Solve for x
   x = 974,050.49/1,315.35
6. Step 6: Final answer
   x = 740.53