Finding the Fourth Proportional to 1,341.50, 2,007.99 and 1,290.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.50 : 2,007.99 = 1,290.47 : x
2. Step 2: Convert to fraction form
   1,341.50/2,007.99 = 1,290.47/x
3. Step 3: Cross multiply
   1,341.50x = 2,007.99 × 1,290.47
4. Step 4: Simplify right side
   1,341.50x = 2,591,240.82
5. Step 5: Solve for x
   x = 2,591,240.82/1,341.50
6. Step 6: Final answer
   x = 1,931.61