Finding the Fourth Proportional to 9,156.72, 12,636.28 and 4,965

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.72 : 12,636.28 = 4,965 : x
2. Step 2: Convert to fraction form
   9,156.72/12,636.28 = 4,965/x
3. Step 3: Cross multiply
   9,156.72x = 12,636.28 × 4,965
4. Step 4: Simplify right side
   9,156.72x = 62,739,130.20
5. Step 5: Solve for x
   x = 62,739,130.20/9,156.72
6. Step 6: Final answer
   x = 6,851.70