Finding the Fourth Proportional to 3,886.45, 5,452.55 and 3,886.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.45 : 5,452.55 = 3,886.45 : x
2. Step 2: Convert to fraction form
   3,886.45/5,452.55 = 3,886.45/x
3. Step 3: Cross multiply
   3,886.45x = 5,452.55 × 3,886.45
4. Step 4: Simplify right side
   3,886.45x = 21,191,062.95
5. Step 5: Solve for x
   x = 21,191,062.95/3,886.45
6. Step 6: Final answer
   x = 5,452.55