Finding the Fourth Proportional to 2,607.90, 3,598.88 and 1,428.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.90 : 3,598.88 = 1,428.98 : x
2. Step 2: Convert to fraction form
   2,607.90/3,598.88 = 1,428.98/x
3. Step 3: Cross multiply
   2,607.90x = 3,598.88 × 1,428.98
4. Step 4: Simplify right side
   2,607.90x = 5,142,727.54
5. Step 5: Solve for x
   x = 5,142,727.54/2,607.90
6. Step 6: Final answer
   x = 1,971.98