Finding the Fourth Proportional to 7,964.42, 10,980.56 and 5,126.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,964.42 : 10,980.56 = 5,126.72 : x
2. Step 2: Convert to fraction form
   7,964.42/10,980.56 = 5,126.72/x
3. Step 3: Cross multiply
   7,964.42x = 10,980.56 × 5,126.72
4. Step 4: Simplify right side
   7,964.42x = 56,294,214.48
5. Step 5: Solve for x
   x = 56,294,214.48/7,964.42
6. Step 6: Final answer
   x = 7,068.22