Finding the Fourth Proportional to 9,906.08, 13,669.76 and 5,429.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,906.08 : 13,669.76 = 5,429.04 : x
2. Step 2: Convert to fraction form
   9,906.08/13,669.76 = 5,429.04/x
3. Step 3: Cross multiply
   9,906.08x = 13,669.76 × 5,429.04
4. Step 4: Simplify right side
   9,906.08x = 74,213,673.83
5. Step 5: Solve for x
   x = 74,213,673.83/9,906.08
6. Step 6: Final answer
   x = 7,491.73