Finding the Fourth Proportional to 9,065.60, 12,511.68 and 5,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,065.60 : 12,511.68 = 5,528.72 : x
2. Step 2: Convert to fraction form
   9,065.60/12,511.68 = 5,528.72/x
3. Step 3: Cross multiply
   9,065.60x = 12,511.68 × 5,528.72
4. Step 4: Simplify right side
   9,065.60x = 69,173,575.45
5. Step 5: Solve for x
   x = 69,173,575.45/9,065.60
6. Step 6: Final answer
   x = 7,630.34