Finding the Third Proportional to 21,289.78 and 43,946.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,289.78 : 43,946.16 = 43,946.16 : x
2. Step 2: Convert to fraction form
   21,289.78/43,946.16 = 43,946.16/x
3. Step 3: Cross multiply
   21,289.78x = 43,946.16 × 43,946.16
4. Step 4: Simplify right side
   21,289.78x = 1,931,264,649.15
5. Step 5: Solve for x
   x = 1,931,264,649.15/21,289.78
6. Step 6: Final answer
   x = 90,713.22