Finding the Fourth Proportional to 3,612.48, 4,978.48 and 3,548.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,612.48 : 4,978.48 = 3,548.64 : x
2. Step 2: Convert to fraction form
   3,612.48/4,978.48 = 3,548.64/x
3. Step 3: Cross multiply
   3,612.48x = 4,978.48 × 3,548.64
4. Step 4: Simplify right side
   3,612.48x = 17,666,833.27
5. Step 5: Solve for x
   x = 17,666,833.27/3,612.48
6. Step 6: Final answer
   x = 4,890.50