Finding the Fourth Proportional to 11,492.08, 15,865.68 and 7,720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,492.08 : 15,865.68 = 7,720.72 : x
2. Step 2: Convert to fraction form
   11,492.08/15,865.68 = 7,720.72/x
3. Step 3: Cross multiply
   11,492.08x = 15,865.68 × 7,720.72
4. Step 4: Simplify right side
   11,492.08x = 122,494,472.89
5. Step 5: Solve for x
   x = 122,494,472.89/11,492.08
6. Step 6: Final answer
   x = 10,659.03