Finding the Fourth Proportional to 3,610.12, 5,389.01 and 3,172.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,610.12 : 5,389.01 = 3,172.72 : x
2. Step 2: Convert to fraction form
   3,610.12/5,389.01 = 3,172.72/x
3. Step 3: Cross multiply
   3,610.12x = 5,389.01 × 3,172.72
4. Step 4: Simplify right side
   3,610.12x = 17,097,819.81
5. Step 5: Solve for x
   x = 17,097,819.81/3,610.12
6. Step 6: Final answer
   x = 4,736.08