Finding the Fourth Proportional to 2,303.34, 3,172.16 and 2,155.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,303.34 : 3,172.16 = 2,155.10 : x
2. Step 2: Convert to fraction form
   2,303.34/3,172.16 = 2,155.10/x
3. Step 3: Cross multiply
   2,303.34x = 3,172.16 × 2,155.10
4. Step 4: Simplify right side
   2,303.34x = 6,836,322.02
5. Step 5: Solve for x
   x = 6,836,322.02/2,303.34
6. Step 6: Final answer
   x = 2,968.00