Finding the Fourth Proportional to 9,906.16, 13,669.88 and 5,429

Step by Step Solution

1. Step 1: Write the proportion equation
   9,906.16 : 13,669.88 = 5,429 : x
2. Step 2: Convert to fraction form
   9,906.16/13,669.88 = 5,429/x
3. Step 3: Cross multiply
   9,906.16x = 13,669.88 × 5,429
4. Step 4: Simplify right side
   9,906.16x = 74,213,778.52
5. Step 5: Solve for x
   x = 74,213,778.52/9,906.16
6. Step 6: Final answer
   x = 7,491.68