Finding the Fourth Proportional to 1,315.41, 1,973.72 and 493.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.41 : 1,973.72 = 493.57 : x
2. Step 2: Convert to fraction form
   1,315.41/1,973.72 = 493.57/x
3. Step 3: Cross multiply
   1,315.41x = 1,973.72 × 493.57
4. Step 4: Simplify right side
   1,315.41x = 974,168.98
5. Step 5: Solve for x
   x = 974,168.98/1,315.41
6. Step 6: Final answer
   x = 740.58