Finding the Fourth Proportional to 3,782.60, 5,215.56 and 2,663.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,782.60 : 5,215.56 = 2,663.72 : x
2. Step 2: Convert to fraction form
   3,782.60/5,215.56 = 2,663.72/x
3. Step 3: Cross multiply
   3,782.60x = 5,215.56 × 2,663.72
4. Step 4: Simplify right side
   3,782.60x = 13,892,791.48
5. Step 5: Solve for x
   x = 13,892,791.48/3,782.60
6. Step 6: Final answer
   x = 3,672.82