Finding the Fourth Proportional to 1,341.47, 1,851.63 and 817.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.47 : 1,851.63 = 817.76 : x
2. Step 2: Convert to fraction form
   1,341.47/1,851.63 = 817.76/x
3. Step 3: Cross multiply
   1,341.47x = 1,851.63 × 817.76
4. Step 4: Simplify right side
   1,341.47x = 1,514,188.95
5. Step 5: Solve for x
   x = 1,514,188.95/1,341.47
6. Step 6: Final answer
   x = 1,128.75