Finding the Fourth Proportional to 1,555.57, 2,146.69 and 892.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.57 : 2,146.69 = 892.30 : x
2. Step 2: Convert to fraction form
   1,555.57/2,146.69 = 892.30/x
3. Step 3: Cross multiply
   1,555.57x = 2,146.69 × 892.30
4. Step 4: Simplify right side
   1,555.57x = 1,915,483.89
5. Step 5: Solve for x
   x = 1,915,483.89/1,555.57
6. Step 6: Final answer
   x = 1,231.37