Finding the Fourth Proportional to 11,787.86, 17,671.86 and 5,119.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,787.86 : 17,671.86 = 5,119.34 : x
2. Step 2: Convert to fraction form
   11,787.86/17,671.86 = 5,119.34/x
3. Step 3: Cross multiply
   11,787.86x = 17,671.86 × 5,119.34
4. Step 4: Simplify right side
   11,787.86x = 90,468,259.77
5. Step 5: Solve for x
   x = 90,468,259.77/11,787.86
6. Step 6: Final answer
   x = 7,674.70