Finding the Fourth Proportional to 1,887.50, 2,603.07 and 1,223.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,887.50 : 2,603.07 = 1,223.69 : x
2. Step 2: Convert to fraction form
   1,887.50/2,603.07 = 1,223.69/x
3. Step 3: Cross multiply
   1,887.50x = 2,603.07 × 1,223.69
4. Step 4: Simplify right side
   1,887.50x = 3,185,350.73
5. Step 5: Solve for x
   x = 3,185,350.73/1,887.50
6. Step 6: Final answer
   x = 1,687.60