Finding the Fourth Proportional to 9,404.76, 12,978 and 5,154.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.76 : 12,978 = 5,154.96 : x
2. Step 2: Convert to fraction form
   9,404.76/12,978 = 5,154.96/x
3. Step 3: Cross multiply
   9,404.76x = 12,978 × 5,154.96
4. Step 4: Simplify right side
   9,404.76x = 66,901,070.88
5. Step 5: Solve for x
   x = 66,901,070.88/9,404.76
6. Step 6: Final answer
   x = 7,113.53