Finding the Fourth Proportional to 3,781.98, 5,674.61 and 1,315.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,781.98 : 5,674.61 = 1,315.46 : x
2. Step 2: Convert to fraction form
   3,781.98/5,674.61 = 1,315.46/x
3. Step 3: Cross multiply
   3,781.98x = 5,674.61 × 1,315.46
4. Step 4: Simplify right side
   3,781.98x = 7,464,687.52
5. Step 5: Solve for x
   x = 7,464,687.52/3,781.98
6. Step 6: Final answer
   x = 1,973.75