Finding the Fourth Proportional to 2,485.98, 3,430.50 and 1,491.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.98 : 3,430.50 = 1,491.80 : x
2. Step 2: Convert to fraction form
   2,485.98/3,430.50 = 1,491.80/x
3. Step 3: Cross multiply
   2,485.98x = 3,430.50 × 1,491.80
4. Step 4: Simplify right side
   2,485.98x = 5,117,619.90
5. Step 5: Solve for x
   x = 5,117,619.90/2,485.98
6. Step 6: Final answer
   x = 2,058.59