Finding the Fourth Proportional to 3,782.72, 5,675.52 and 1,317.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,782.72 : 5,675.52 = 1,317.80 : x
2. Step 2: Convert to fraction form
   3,782.72/5,675.52 = 1,317.80/x
3. Step 3: Cross multiply
   3,782.72x = 5,675.52 × 1,317.80
4. Step 4: Simplify right side
   3,782.72x = 7,479,200.26
5. Step 5: Solve for x
   x = 7,479,200.26/3,782.72
6. Step 6: Final answer
   x = 1,977.20