Finding the Fourth Proportional to 1,555.20, 2,146.20 and 892.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.20 : 2,146.20 = 892.02 : x
2. Step 2: Convert to fraction form
   1,555.20/2,146.20 = 892.02/x
3. Step 3: Cross multiply
   1,555.20x = 2,146.20 × 892.02
4. Step 4: Simplify right side
   1,555.20x = 1,914,453.32
5. Step 5: Solve for x
   x = 1,914,453.32/1,555.20
6. Step 6: Final answer
   x = 1,231.00