Finding the Third Proportional to 42,345 and 90,521

Step by Step Solution

1. Step 1: Write the proportion equation
   42,345 : 90,521 = 90,521 : x
2. Step 2: Convert to fraction form
   42,345/90,521 = 90,521/x
3. Step 3: Cross multiply
   42,345x = 90,521 × 90,521
4. Step 4: Simplify right side
   42,345x = 8,194,051,441
5. Step 5: Solve for x
   x = 8,194,051,441/42,345
6. Step 6: Final answer
   x = 193,506.94