Finding the Fourth Proportional to 1,422.11, 1,962.50 and 801.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.11 : 1,962.50 = 801.11 : x
2. Step 2: Convert to fraction form
   1,422.11/1,962.50 = 801.11/x
3. Step 3: Cross multiply
   1,422.11x = 1,962.50 × 801.11
4. Step 4: Simplify right side
   1,422.11x = 1,572,164.56
5. Step 5: Solve for x
   x = 1,572,164.56/1,422.11
6. Step 6: Final answer
   x = 1,105.52