Finding the Fourth Proportional to 9,404.88, 12,979.06 and 5,156.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.88 : 12,979.06 = 5,156.34 : x
2. Step 2: Convert to fraction form
   9,404.88/12,979.06 = 5,156.34/x
3. Step 3: Cross multiply
   9,404.88x = 12,979.06 × 5,156.34
4. Step 4: Simplify right side
   9,404.88x = 66,924,446.24
5. Step 5: Solve for x
   x = 66,924,446.24/9,404.88
6. Step 6: Final answer
   x = 7,115.93