Finding the Fourth Proportional to 7,787.83, 11,685.39 and 3,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,787.83 : 11,685.39 = 3,404.72 : x
2. Step 2: Convert to fraction form
   7,787.83/11,685.39 = 3,404.72/x
3. Step 3: Cross multiply
   7,787.83x = 11,685.39 × 3,404.72
4. Step 4: Simplify right side
   7,787.83x = 39,785,405.59
5. Step 5: Solve for x
   x = 39,785,405.59/7,787.83
6. Step 6: Final answer
   x = 5,108.67