Finding the Fourth Proportional to 1,687.59, 2,531.82 and 907.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.59 : 2,531.82 = 907.25 : x
2. Step 2: Convert to fraction form
   1,687.59/2,531.82 = 907.25/x
3. Step 3: Cross multiply
   1,687.59x = 2,531.82 × 907.25
4. Step 4: Simplify right side
   1,687.59x = 2,296,981.04
5. Step 5: Solve for x
   x = 2,296,981.04/1,687.59
6. Step 6: Final answer
   x = 1,361.10