Finding the Fourth Proportional to 9,404.17, 12,977.67 and 5,155.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.17 : 12,977.67 = 5,155.47 : x
2. Step 2: Convert to fraction form
   9,404.17/12,977.67 = 5,155.47/x
3. Step 3: Cross multiply
   9,404.17x = 12,977.67 × 5,155.47
4. Step 4: Simplify right side
   9,404.17x = 66,906,020.80
5. Step 5: Solve for x
   x = 66,906,020.80/9,404.17
6. Step 6: Final answer
   x = 7,114.51