Finding the Fourth Proportional to 2,830.86, 4,247.37 and 1,291.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,830.86 : 4,247.37 = 1,291.50 : x
2. Step 2: Convert to fraction form
   2,830.86/4,247.37 = 1,291.50/x
3. Step 3: Cross multiply
   2,830.86x = 4,247.37 × 1,291.50
4. Step 4: Simplify right side
   2,830.86x = 5,485,478.36
5. Step 5: Solve for x
   x = 5,485,478.36/2,830.86
6. Step 6: Final answer
   x = 1,937.74