Finding the Fourth Proportional to 2,539.89, 3,505.05 and 1,435.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,539.89 : 3,505.05 = 1,435.89 : x
2. Step 2: Convert to fraction form
   2,539.89/3,505.05 = 1,435.89/x
3. Step 3: Cross multiply
   2,539.89x = 3,505.05 × 1,435.89
4. Step 4: Simplify right side
   2,539.89x = 5,032,866.24
5. Step 5: Solve for x
   x = 5,032,866.24/2,539.89
6. Step 6: Final answer
   x = 1,981.53