Finding the Fourth Proportional to 2,057.90, 2,839.91 and 1,173.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.90 : 2,839.91 = 1,173.98 : x
2. Step 2: Convert to fraction form
   2,057.90/2,839.91 = 1,173.98/x
3. Step 3: Cross multiply
   2,057.90x = 2,839.91 × 1,173.98
4. Step 4: Simplify right side
   2,057.90x = 3,333,977.47
5. Step 5: Solve for x
   x = 3,333,977.47/2,057.90
6. Step 6: Final answer
   x = 1,620.09