Finding the Fourth Proportional to 3,988.68, 5,970.71 and 3,648.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,988.68 : 5,970.71 = 3,648.48 : x
2. Step 2: Convert to fraction form
   3,988.68/5,970.71 = 3,648.48/x
3. Step 3: Cross multiply
   3,988.68x = 5,970.71 × 3,648.48
4. Step 4: Simplify right side
   3,988.68x = 21,784,002.75
5. Step 5: Solve for x
   x = 21,784,002.75/3,988.68
6. Step 6: Final answer
   x = 5,461.46