Finding the Third Proportional to 21,078 and 45,440

Step by Step Solution

1. Step 1: Write the proportion equation
   21,078 : 45,440 = 45,440 : x
2. Step 2: Convert to fraction form
   21,078/45,440 = 45,440/x
3. Step 3: Cross multiply
   21,078x = 45,440 × 45,440
4. Step 4: Simplify right side
   21,078x = 2,064,793,600
5. Step 5: Solve for x
   x = 2,064,793,600/21,078
6. Step 6: Final answer
   x = 97,959.65