Finding the Fourth Proportional to 2,607.06, 3,597.69 and 1,428.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.06 : 3,597.69 = 1,428.12 : x
2. Step 2: Convert to fraction form
   2,607.06/3,597.69 = 1,428.12/x
3. Step 3: Cross multiply
   2,607.06x = 3,597.69 × 1,428.12
4. Step 4: Simplify right side
   2,607.06x = 5,137,933.04
5. Step 5: Solve for x
   x = 5,137,933.04/2,607.06
6. Step 6: Final answer
   x = 1,970.78