Finding the Fourth Proportional to 9,905.29, 13,669.50 and 5,429.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,905.29 : 13,669.50 = 5,429.02 : x
2. Step 2: Convert to fraction form
   9,905.29/13,669.50 = 5,429.02/x
3. Step 3: Cross multiply
   9,905.29x = 13,669.50 × 5,429.02
4. Step 4: Simplify right side
   9,905.29x = 74,211,988.89
5. Step 5: Solve for x
   x = 74,211,988.89/9,905.29
6. Step 6: Final answer
   x = 7,492.16