Finding the Fourth Proportional to 8,709.60, 12,019.32 and 4,730.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,709.60 : 12,019.32 = 4,730.72 : x
2. Step 2: Convert to fraction form
   8,709.60/12,019.32 = 4,730.72/x
3. Step 3: Cross multiply
   8,709.60x = 12,019.32 × 4,730.72
4. Step 4: Simplify right side
   8,709.60x = 56,859,968.54
5. Step 5: Solve for x
   x = 56,859,968.54/8,709.60
6. Step 6: Final answer
   x = 6,528.42