Finding the Fourth Proportional to 7,440.96, 10,266.72 and 4,128.96

Step by Step Solution

1. Step 1: Write the proportion equation
   7,440.96 : 10,266.72 = 4,128.96 : x
2. Step 2: Convert to fraction form
   7,440.96/10,266.72 = 4,128.96/x
3. Step 3: Cross multiply
   7,440.96x = 10,266.72 × 4,128.96
4. Step 4: Simplify right side
   7,440.96x = 42,390,876.21
5. Step 5: Solve for x
   x = 42,390,876.21/7,440.96
6. Step 6: Final answer
   x = 5,696.96