Finding the Fourth Proportional to 1,342.02, 1,852.46 and 811.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.02 : 1,852.46 = 811.20 : x
2. Step 2: Convert to fraction form
   1,342.02/1,852.46 = 811.20/x
3. Step 3: Cross multiply
   1,342.02x = 1,852.46 × 811.20
4. Step 4: Simplify right side
   1,342.02x = 1,502,711.50
5. Step 5: Solve for x
   x = 1,502,711.50/1,342.02
6. Step 6: Final answer
   x = 1,119.74