Finding the Fourth Proportional to 9,267.18, 12,788.31 and 5,730.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,267.18 : 12,788.31 = 5,730.78 : x
2. Step 2: Convert to fraction form
   9,267.18/12,788.31 = 5,730.78/x
3. Step 3: Cross multiply
   9,267.18x = 12,788.31 × 5,730.78
4. Step 4: Simplify right side
   9,267.18x = 73,286,991.18
5. Step 5: Solve for x
   x = 73,286,991.18/9,267.18
6. Step 6: Final answer
   x = 7,908.23