Finding the Fourth Proportional to 10,663.34, 15,993.20 and 2,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,663.34 : 15,993.20 = 2,870.42 : x
2. Step 2: Convert to fraction form
   10,663.34/15,993.20 = 2,870.42/x
3. Step 3: Cross multiply
   10,663.34x = 15,993.20 × 2,870.42
4. Step 4: Simplify right side
   10,663.34x = 45,907,201.14
5. Step 5: Solve for x
   x = 45,907,201.14/10,663.34
6. Step 6: Final answer
   x = 4,305.14