Finding the Fourth Proportional to 2,315.69, 3,194.89 and 1,320.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.69 : 3,194.89 = 1,320.77 : x
2. Step 2: Convert to fraction form
   2,315.69/3,194.89 = 1,320.77/x
3. Step 3: Cross multiply
   2,315.69x = 3,194.89 × 1,320.77
4. Step 4: Simplify right side
   2,315.69x = 4,219,726.98
5. Step 5: Solve for x
   x = 4,219,726.98/2,315.69
6. Step 6: Final answer
   x = 1,822.23