Finding the Fourth Proportional to 7,784.56, 10,742.55 and 4,247.68

Step by Step Solution

1. Step 1: Write the proportion equation
   7,784.56 : 10,742.55 = 4,247.68 : x
2. Step 2: Convert to fraction form
   7,784.56/10,742.55 = 4,247.68/x
3. Step 3: Cross multiply
   7,784.56x = 10,742.55 × 4,247.68
4. Step 4: Simplify right side
   7,784.56x = 45,630,914.78
5. Step 5: Solve for x
   x = 45,630,914.78/7,784.56
6. Step 6: Final answer
   x = 5,861.72