Finding the Fourth Proportional to 10,665.46, 15,994.14 and 5,115.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.46 : 15,994.14 = 5,115.34 : x
2. Step 2: Convert to fraction form
   10,665.46/15,994.14 = 5,115.34/x
3. Step 3: Cross multiply
   10,665.46x = 15,994.14 × 5,115.34
4. Step 4: Simplify right side
   10,665.46x = 81,815,464.11
5. Step 5: Solve for x
   x = 81,815,464.11/10,665.46
6. Step 6: Final answer
   x = 7,671.07