Finding the Fourth Proportional to 2,607, 3,597.78 and 1,428.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607 : 3,597.78 = 1,428.12 : x
2. Step 2: Convert to fraction form
   2,607/3,597.78 = 1,428.12/x
3. Step 3: Cross multiply
   2,607x = 3,597.78 × 1,428.12
4. Step 4: Simplify right side
   2,607x = 5,138,061.57
5. Step 5: Solve for x
   x = 5,138,061.57/2,607
6. Step 6: Final answer
   x = 1,970.87