Finding the Fourth Proportional to 1,610.84, 2,419.98 and 1,399.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.84 : 2,419.98 = 1,399.64 : x
2. Step 2: Convert to fraction form
   1,610.84/2,419.98 = 1,399.64/x
3. Step 3: Cross multiply
   1,610.84x = 2,419.98 × 1,399.64
4. Step 4: Simplify right side
   1,610.84x = 3,387,100.81
5. Step 5: Solve for x
   x = 3,387,100.81/1,610.84
6. Step 6: Final answer
   x = 2,102.69