Finding the Fourth Proportional to 7,809.50, 10,777.10 and 4,272.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,809.50 : 10,777.10 = 4,272.72 : x
2. Step 2: Convert to fraction form
   7,809.50/10,777.10 = 4,272.72/x
3. Step 3: Cross multiply
   7,809.50x = 10,777.10 × 4,272.72
4. Step 4: Simplify right side
   7,809.50x = 46,047,530.71
5. Step 5: Solve for x
   x = 46,047,530.71/7,809.50
6. Step 6: Final answer
   x = 5,896.35