Finding the Fourth Proportional to 1,341.48, 1,851.28 and 817.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.48 : 1,851.28 = 817.50 : x
2. Step 2: Convert to fraction form
   1,341.48/1,851.28 = 817.50/x
3. Step 3: Cross multiply
   1,341.48x = 1,851.28 × 817.50
4. Step 4: Simplify right side
   1,341.48x = 1,513,421.40
5. Step 5: Solve for x
   x = 1,513,421.40/1,341.48
6. Step 6: Final answer
   x = 1,128.17