Finding the Fourth Proportional to 1,951.86, 2,926.17 and 911.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,951.86 : 2,926.17 = 911.31 : x
2. Step 2: Convert to fraction form
   1,951.86/2,926.17 = 911.31/x
3. Step 3: Cross multiply
   1,951.86x = 2,926.17 × 911.31
4. Step 4: Simplify right side
   1,951.86x = 2,666,647.98
5. Step 5: Solve for x
   x = 2,666,647.98/1,951.86
6. Step 6: Final answer
   x = 1,366.21