Finding the Fourth Proportional to 1,637.20, 2,261.89 and 1,505.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,637.20 : 2,261.89 = 1,505.98 : x
2. Step 2: Convert to fraction form
   1,637.20/2,261.89 = 1,505.98/x
3. Step 3: Cross multiply
   1,637.20x = 2,261.89 × 1,505.98
4. Step 4: Simplify right side
   1,637.20x = 3,406,361.10
5. Step 5: Solve for x
   x = 3,406,361.10/1,637.20
6. Step 6: Final answer
   x = 2,080.60