Finding the Fourth Proportional to 2,607.11, 3,597.81 and 1,428.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.11 : 3,597.81 = 1,428.18 : x
2. Step 2: Convert to fraction form
   2,607.11/3,597.81 = 1,428.18/x
3. Step 3: Cross multiply
   2,607.11x = 3,597.81 × 1,428.18
4. Step 4: Simplify right side
   2,607.11x = 5,138,320.29
5. Step 5: Solve for x
   x = 5,138,320.29/2,607.11
6. Step 6: Final answer
   x = 1,970.89