Finding the Fourth Proportional to 3,897.08, 5,405.53 and 3,756.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,897.08 : 5,405.53 = 3,756.98 : x
2. Step 2: Convert to fraction form
   3,897.08/5,405.53 = 3,756.98/x
3. Step 3: Cross multiply
   3,897.08x = 5,405.53 × 3,756.98
4. Step 4: Simplify right side
   3,897.08x = 20,308,468.10
5. Step 5: Solve for x
   x = 20,308,468.10/3,897.08
6. Step 6: Final answer
   x = 5,211.20