Finding the Fourth Proportional to 9,906.05, 13,670.30 and 5,429.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,906.05 : 13,670.30 = 5,429.99 : x
2. Step 2: Convert to fraction form
   9,906.05/13,670.30 = 5,429.99/x
3. Step 3: Cross multiply
   9,906.05x = 13,670.30 × 5,429.99
4. Step 4: Simplify right side
   9,906.05x = 74,229,565.15
5. Step 5: Solve for x
   x = 74,229,565.15/9,906.05
6. Step 6: Final answer
   x = 7,493.36