Finding the Fourth Proportional to 2,599, 3,899.91 and 1,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599 : 3,899.91 = 1,505.50 : x
2. Step 2: Convert to fraction form
   2,599/3,899.91 = 1,505.50/x
3. Step 3: Cross multiply
   2,599x = 3,899.91 × 1,505.50
4. Step 4: Simplify right side
   2,599x = 5,871,314.51
5. Step 5: Solve for x
   x = 5,871,314.51/2,599
6. Step 6: Final answer
   x = 2,259.07