Finding the Fourth Proportional to 3,899.55, 5,821.56 and 3,762.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.55 : 5,821.56 = 3,762.87 : x
2. Step 2: Convert to fraction form
   3,899.55/5,821.56 = 3,762.87/x
3. Step 3: Cross multiply
   3,899.55x = 5,821.56 × 3,762.87
4. Step 4: Simplify right side
   3,899.55x = 21,905,773.48
5. Step 5: Solve for x
   x = 21,905,773.48/3,899.55
6. Step 6: Final answer
   x = 5,617.51