Finding the Fourth Proportional to 10,662.14, 15,994.17 and 2,870.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,662.14 : 15,994.17 = 2,870.78 : x
2. Step 2: Convert to fraction form
   10,662.14/15,994.17 = 2,870.78/x
3. Step 3: Cross multiply
   10,662.14x = 15,994.17 × 2,870.78
4. Step 4: Simplify right side
   10,662.14x = 45,915,743.35
5. Step 5: Solve for x
   x = 45,915,743.35/10,662.14
6. Step 6: Final answer
   x = 4,306.43