Finding the Fourth Proportional to 1,887.67, 2,604.27 and 1,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,887.67 : 2,604.27 = 1,391.50 : x
2. Step 2: Convert to fraction form
   1,887.67/2,604.27 = 1,391.50/x
3. Step 3: Cross multiply
   1,887.67x = 2,604.27 × 1,391.50
4. Step 4: Simplify right side
   1,887.67x = 3,623,841.71
5. Step 5: Solve for x
   x = 3,623,841.71/1,887.67
6. Step 6: Final answer
   x = 1,919.74