Finding the Third Proportional to 21,163.78 and 30,166.17

Step by Step Solution

1. Step 1: Write the proportion equation
   21,163.78 : 30,166.17 = 30,166.17 : x
2. Step 2: Convert to fraction form
   21,163.78/30,166.17 = 30,166.17/x
3. Step 3: Cross multiply
   21,163.78x = 30,166.17 × 30,166.17
4. Step 4: Simplify right side
   21,163.78x = 909,997,925.59
5. Step 5: Solve for x
   x = 909,997,925.59/21,163.78
6. Step 6: Final answer
   x = 42,997.89