Finding the Fourth Proportional to 11,772.72, 17,658.72 and 4,842

Step by Step Solution

1. Step 1: Write the proportion equation
   11,772.72 : 17,658.72 = 4,842 : x
2. Step 2: Convert to fraction form
   11,772.72/17,658.72 = 4,842/x
3. Step 3: Cross multiply
   11,772.72x = 17,658.72 × 4,842
4. Step 4: Simplify right side
   11,772.72x = 85,503,522.24
5. Step 5: Solve for x
   x = 85,503,522.24/11,772.72
6. Step 6: Final answer
   x = 7,262.85