Finding the Third Proportional to 9,117.56 and 21,143.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,117.56 : 21,143.53 = 21,143.53 : x
2. Step 2: Convert to fraction form
   9,117.56/21,143.53 = 21,143.53/x
3. Step 3: Cross multiply
   9,117.56x = 21,143.53 × 21,143.53
4. Step 4: Simplify right side
   9,117.56x = 447,048,913.72
5. Step 5: Solve for x
   x = 447,048,913.72/9,117.56
6. Step 6: Final answer
   x = 49,031.63