Finding the Fourth Proportional to 10,666.08, 16,002.45 and 4,429.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,666.08 : 16,002.45 = 4,429.08 : x
2. Step 2: Convert to fraction form
   10,666.08/16,002.45 = 4,429.08/x
3. Step 3: Cross multiply
   10,666.08x = 16,002.45 × 4,429.08
4. Step 4: Simplify right side
   10,666.08x = 70,876,131.25
5. Step 5: Solve for x
   x = 70,876,131.25/10,666.08
6. Step 6: Final answer
   x = 6,645.00