Finding the Fourth Proportional to 2,695.59, 3,720.38 and 1,991.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,695.59 : 3,720.38 = 1,991.10 : x
2. Step 2: Convert to fraction form
   2,695.59/3,720.38 = 1,991.10/x
3. Step 3: Cross multiply
   2,695.59x = 3,720.38 × 1,991.10
4. Step 4: Simplify right side
   2,695.59x = 7,407,638.66
5. Step 5: Solve for x
   x = 7,407,638.66/2,695.59
6. Step 6: Final answer
   x = 2,748.06