Finding the Fourth Proportional to 2,092.36, 3,142.72 and 1,312.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.36 : 3,142.72 = 1,312.86 : x
2. Step 2: Convert to fraction form
   2,092.36/3,142.72 = 1,312.86/x
3. Step 3: Cross multiply
   2,092.36x = 3,142.72 × 1,312.86
4. Step 4: Simplify right side
   2,092.36x = 4,125,951.38
5. Step 5: Solve for x
   x = 4,125,951.38/2,092.36
6. Step 6: Final answer
   x = 1,971.91