Finding the Fourth Proportional to 9,310.62, 12,848.55 and 5,118.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,310.62 : 12,848.55 = 5,118.78 : x
2. Step 2: Convert to fraction form
   9,310.62/12,848.55 = 5,118.78/x
3. Step 3: Cross multiply
   9,310.62x = 12,848.55 × 5,118.78
4. Step 4: Simplify right side
   9,310.62x = 65,768,900.77
5. Step 5: Solve for x
   x = 65,768,900.77/9,310.62
6. Step 6: Final answer
   x = 7,063.86