Finding the Fourth Proportional to 1,555.42, 2,146.18 and 892.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.42 : 2,146.18 = 892.12 : x
2. Step 2: Convert to fraction form
   1,555.42/2,146.18 = 892.12/x
3. Step 3: Cross multiply
   1,555.42x = 2,146.18 × 892.12
4. Step 4: Simplify right side
   1,555.42x = 1,914,650.10
5. Step 5: Solve for x
   x = 1,914,650.10/1,555.42
6. Step 6: Final answer
   x = 1,230.95