Finding the Fourth Proportional to 11,003.90, 16,505.67 and 4,429.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.90 : 16,505.67 = 4,429.91 : x
2. Step 2: Convert to fraction form
   11,003.90/16,505.67 = 4,429.91/x
3. Step 3: Cross multiply
   11,003.90x = 16,505.67 × 4,429.91
4. Step 4: Simplify right side
   11,003.90x = 73,118,673.85
5. Step 5: Solve for x
   x = 73,118,673.85/11,003.90
6. Step 6: Final answer
   x = 6,644.80