Finding the Fourth Proportional to 2,607.39, 3,598.09 and 1,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.39 : 3,598.09 = 1,428.50 : x
2. Step 2: Convert to fraction form
   2,607.39/3,598.09 = 1,428.50/x
3. Step 3: Cross multiply
   2,607.39x = 3,598.09 × 1,428.50
4. Step 4: Simplify right side
   2,607.39x = 5,139,876.99
5. Step 5: Solve for x
   x = 5,139,876.99/2,607.39
6. Step 6: Final answer
   x = 1,971.27