Finding the Fourth Proportional to 10,429.98, 14,389.77 and 7,909.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,429.98 : 14,389.77 = 7,909.47 : x
2. Step 2: Convert to fraction form
   10,429.98/14,389.77 = 7,909.47/x
3. Step 3: Cross multiply
   10,429.98x = 14,389.77 × 7,909.47
4. Step 4: Simplify right side
   10,429.98x = 113,815,454.12
5. Step 5: Solve for x
   x = 113,815,454.12/10,429.98
6. Step 6: Final answer
   x = 10,912.34