Finding the Fourth Proportional to 7,938.72, 10,959.12 and 5,145.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,938.72 : 10,959.12 = 5,145.12 : x
2. Step 2: Convert to fraction form
   7,938.72/10,959.12 = 5,145.12/x
3. Step 3: Cross multiply
   7,938.72x = 10,959.12 × 5,145.12
4. Step 4: Simplify right side
   7,938.72x = 56,385,987.49
5. Step 5: Solve for x
   x = 56,385,987.49/7,938.72
6. Step 6: Final answer
   x = 7,102.65