Finding the Fourth Proportional to 9,620.98, 13,277.22 and 5,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.98 : 13,277.22 = 5,429.50 : x
2. Step 2: Convert to fraction form
   9,620.98/13,277.22 = 5,429.50/x
3. Step 3: Cross multiply
   9,620.98x = 13,277.22 × 5,429.50
4. Step 4: Simplify right side
   9,620.98x = 72,088,665.99
5. Step 5: Solve for x
   x = 72,088,665.99/9,620.98
6. Step 6: Final answer
   x = 7,492.86