Finding the Fourth Proportional to 10,947.78, 16,429.59 and 4,375.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,947.78 : 16,429.59 = 4,375.80 : x
2. Step 2: Convert to fraction form
   10,947.78/16,429.59 = 4,375.80/x
3. Step 3: Cross multiply
   10,947.78x = 16,429.59 × 4,375.80
4. Step 4: Simplify right side
   10,947.78x = 71,892,599.92
5. Step 5: Solve for x
   x = 71,892,599.92/10,947.78
6. Step 6: Final answer
   x = 6,566.87