Finding the Fourth Proportional to 7,256.40, 10,011.72 and 4,270.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,256.40 : 10,011.72 = 4,270.80 : x
2. Step 2: Convert to fraction form
   7,256.40/10,011.72 = 4,270.80/x
3. Step 3: Cross multiply
   7,256.40x = 10,011.72 × 4,270.80
4. Step 4: Simplify right side
   7,256.40x = 42,758,053.78
5. Step 5: Solve for x
   x = 42,758,053.78/7,256.40
6. Step 6: Final answer
   x = 5,892.46