Finding the Fourth Proportional to 9,778.16, 13,492.10 and 5,528.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778.16 : 13,492.10 = 5,528.09 : x
2. Step 2: Convert to fraction form
   9,778.16/13,492.10 = 5,528.09/x
3. Step 3: Cross multiply
   9,778.16x = 13,492.10 × 5,528.09
4. Step 4: Simplify right side
   9,778.16x = 74,585,515.45
5. Step 5: Solve for x
   x = 74,585,515.45/9,778.16
6. Step 6: Final answer
   x = 7,627.77