Finding the Fourth Proportional to 9,619.84, 13,273.08 and 5,428.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,619.84 : 13,273.08 = 5,428.10 : x
2. Step 2: Convert to fraction form
   9,619.84/13,273.08 = 5,428.10/x
3. Step 3: Cross multiply
   9,619.84x = 13,273.08 × 5,428.10
4. Step 4: Simplify right side
   9,619.84x = 72,047,605.55
5. Step 5: Solve for x
   x = 72,047,605.55/9,619.84
6. Step 6: Final answer
   x = 7,489.48