Finding the Fourth Proportional to 20,743.55, 31,105.60 and 7,586.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,743.55 : 31,105.60 = 7,586.72 : x
2. Step 2: Convert to fraction form
   20,743.55/31,105.60 = 7,586.72/x
3. Step 3: Cross multiply
   20,743.55x = 31,105.60 × 7,586.72
4. Step 4: Simplify right side
   20,743.55x = 235,989,477.63
5. Step 5: Solve for x
   x = 235,989,477.63/20,743.55
6. Step 6: Final answer
   x = 11,376.52