Finding the Fourth Proportional to 1,320.20, 1,822.73 and 848.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.20 : 1,822.73 = 848.30 : x
2. Step 2: Convert to fraction form
   1,320.20/1,822.73 = 848.30/x
3. Step 3: Cross multiply
   1,320.20x = 1,822.73 × 848.30
4. Step 4: Simplify right side
   1,320.20x = 1,546,222.17
5. Step 5: Solve for x
   x = 1,546,222.17/1,320.20
6. Step 6: Final answer
   x = 1,171.21