Finding the Fourth Proportional to 7,200.50, 9,936.72 and 4,056.74

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.50 : 9,936.72 = 4,056.74 : x
2. Step 2: Convert to fraction form
   7,200.50/9,936.72 = 4,056.74/x
3. Step 3: Cross multiply
   7,200.50x = 9,936.72 × 4,056.74
4. Step 4: Simplify right side
   7,200.50x = 40,310,689.49
5. Step 5: Solve for x
   x = 40,310,689.49/7,200.50
6. Step 6: Final answer
   x = 5,598.32