Finding the Fourth Proportional to 2,607.59, 3,598.56 and 1,428.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.59 : 3,598.56 = 1,428.77 : x
2. Step 2: Convert to fraction form
   2,607.59/3,598.56 = 1,428.77/x
3. Step 3: Cross multiply
   2,607.59x = 3,598.56 × 1,428.77
4. Step 4: Simplify right side
   2,607.59x = 5,141,523.57
5. Step 5: Solve for x
   x = 5,141,523.57/2,607.59
6. Step 6: Final answer
   x = 1,971.75