Finding the Fourth Proportional to 3,510.48, 5,290.77 and 3,510.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,510.48 : 5,290.77 = 3,510.48 : x
2. Step 2: Convert to fraction form
   3,510.48/5,290.77 = 3,510.48/x
3. Step 3: Cross multiply
   3,510.48x = 5,290.77 × 3,510.48
4. Step 4: Simplify right side
   3,510.48x = 18,573,142.27
5. Step 5: Solve for x
   x = 18,573,142.27/3,510.48
6. Step 6: Final answer
   x = 5,290.77