Finding the Third Proportional to 42,056 and 90,640

Step by Step Solution

1. Step 1: Write the proportion equation
   42,056 : 90,640 = 90,640 : x
2. Step 2: Convert to fraction form
   42,056/90,640 = 90,640/x
3. Step 3: Cross multiply
   42,056x = 90,640 × 90,640
4. Step 4: Simplify right side
   42,056x = 8,215,609,600
5. Step 5: Solve for x
   x = 8,215,609,600/42,056
6. Step 6: Final answer
   x = 195,349.29