Finding the Fourth Proportional to 10,929.42, 16,398.72 and 4,690.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,929.42 : 16,398.72 = 4,690.80 : x
2. Step 2: Convert to fraction form
   10,929.42/16,398.72 = 4,690.80/x
3. Step 3: Cross multiply
   10,929.42x = 16,398.72 × 4,690.80
4. Step 4: Simplify right side
   10,929.42x = 76,923,115.78
5. Step 5: Solve for x
   x = 76,923,115.78/10,929.42
6. Step 6: Final answer
   x = 7,038.17