Finding the Fourth Proportional to 3,553.02, 5,356.14 and 3,315.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,553.02 : 5,356.14 = 3,315.15 : x
2. Step 2: Convert to fraction form
   3,553.02/5,356.14 = 3,315.15/x
3. Step 3: Cross multiply
   3,553.02x = 5,356.14 × 3,315.15
4. Step 4: Simplify right side
   3,553.02x = 17,756,407.52
5. Step 5: Solve for x
   x = 17,756,407.52/3,553.02
6. Step 6: Final answer
   x = 4,997.55