Finding the Fourth Proportional to 1,555.71, 2,146.80 and 892.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.71 : 2,146.80 = 892.10 : x
2. Step 2: Convert to fraction form
   1,555.71/2,146.80 = 892.10/x
3. Step 3: Cross multiply
   1,555.71x = 2,146.80 × 892.10
4. Step 4: Simplify right side
   1,555.71x = 1,915,149.55
5. Step 5: Solve for x
   x = 1,915,149.55/1,555.71
6. Step 6: Final answer
   x = 1,231.05