Finding the Fourth Proportional to 7,225.48, 9,970.86 and 4,081.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,225.48 : 9,970.86 = 4,081.78 : x
2. Step 2: Convert to fraction form
   7,225.48/9,970.86 = 4,081.78/x
3. Step 3: Cross multiply
   7,225.48x = 9,970.86 × 4,081.78
4. Step 4: Simplify right side
   7,225.48x = 40,698,856.93
5. Step 5: Solve for x
   x = 40,698,856.93/7,225.48
6. Step 6: Final answer
   x = 5,632.69