Finding the Fourth Proportional to 2,173.48, 3,259.16 and 786.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.48 : 3,259.16 = 786.61 : x
2. Step 2: Convert to fraction form
   2,173.48/3,259.16 = 786.61/x
3. Step 3: Cross multiply
   2,173.48x = 3,259.16 × 786.61
4. Step 4: Simplify right side
   2,173.48x = 2,563,693.15
5. Step 5: Solve for x
   x = 2,563,693.15/2,173.48
6. Step 6: Final answer
   x = 1,179.53