Finding the Fourth Proportional to 7,784.31, 10,742.31 and 4,247.49

Step by Step Solution

1. Step 1: Write the proportion equation
   7,784.31 : 10,742.31 = 4,247.49 : x
2. Step 2: Convert to fraction form
   7,784.31/10,742.31 = 4,247.49/x
3. Step 3: Cross multiply
   7,784.31x = 10,742.31 × 4,247.49
4. Step 4: Simplify right side
   7,784.31x = 45,627,854.30
5. Step 5: Solve for x
   x = 45,627,854.30/7,784.31
6. Step 6: Final answer
   x = 5,861.52