Finding the Fourth Proportional to 2,173.07, 3,259.86 and 787.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.07 : 3,259.86 = 787.06 : x
2. Step 2: Convert to fraction form
   2,173.07/3,259.86 = 787.06/x
3. Step 3: Cross multiply
   2,173.07x = 3,259.86 × 787.06
4. Step 4: Simplify right side
   2,173.07x = 2,565,694.31
5. Step 5: Solve for x
   x = 2,565,694.31/2,173.07
6. Step 6: Final answer
   x = 1,180.68