Finding the Fourth Proportional to 3,648.80, 4,927.50 and 3,648.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,648.80 : 4,927.50 = 3,648.80 : x
2. Step 2: Convert to fraction form
   3,648.80/4,927.50 = 3,648.80/x
3. Step 3: Cross multiply
   3,648.80x = 4,927.50 × 3,648.80
4. Step 4: Simplify right side
   3,648.80x = 17,979,462
5. Step 5: Solve for x
   x = 17,979,462/3,648.80
6. Step 6: Final answer
   x = 4,927.50