Finding the Fourth Proportional to 2,173.38, 3,259.71 and 786.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.38 : 3,259.71 = 786.48 : x
2. Step 2: Convert to fraction form
   2,173.38/3,259.71 = 786.48/x
3. Step 3: Cross multiply
   2,173.38x = 3,259.71 × 786.48
4. Step 4: Simplify right side
   2,173.38x = 2,563,696.72
5. Step 5: Solve for x
   x = 2,563,696.72/2,173.38
6. Step 6: Final answer
   x = 1,179.59