Finding the Fourth Proportional to 9,404.74, 12,978 and 5,154.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.74 : 12,978 = 5,154.97 : x
2. Step 2: Convert to fraction form
   9,404.74/12,978 = 5,154.97/x
3. Step 3: Cross multiply
   9,404.74x = 12,978 × 5,154.97
4. Step 4: Simplify right side
   9,404.74x = 66,901,200.66
5. Step 5: Solve for x
   x = 66,901,200.66/9,404.74
6. Step 6: Final answer
   x = 7,113.56