Finding the Fourth Proportional to 9,404.99, 12,979.04 and 5,156.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.99 : 12,979.04 = 5,156.46 : x
2. Step 2: Convert to fraction form
   9,404.99/12,979.04 = 5,156.46/x
3. Step 3: Cross multiply
   9,404.99x = 12,979.04 × 5,156.46
4. Step 4: Simplify right side
   9,404.99x = 66,925,874.82
5. Step 5: Solve for x
   x = 66,925,874.82/9,404.99
6. Step 6: Final answer
   x = 7,115.99