Finding the Fourth Proportional to 10,994.73, 15,179.61 and 8,472.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,994.73 : 15,179.61 = 8,472.05 : x
2. Step 2: Convert to fraction form
   10,994.73/15,179.61 = 8,472.05/x
3. Step 3: Cross multiply
   10,994.73x = 15,179.61 × 8,472.05
4. Step 4: Simplify right side
   10,994.73x = 128,602,414.90
5. Step 5: Solve for x
   x = 128,602,414.90/10,994.73
6. Step 6: Final answer
   x = 11,696.73