Finding the Fourth Proportional to 1,341.45, 1,850.91 and 809.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.45 : 1,850.91 = 809.91 : x
2. Step 2: Convert to fraction form
   1,341.45/1,850.91 = 809.91/x
3. Step 3: Cross multiply
   1,341.45x = 1,850.91 × 809.91
4. Step 4: Simplify right side
   1,341.45x = 1,499,070.52
5. Step 5: Solve for x
   x = 1,499,070.52/1,341.45
6. Step 6: Final answer
   x = 1,117.50