Finding the Third Proportional to 31,311 and 48,490

Step by Step Solution

1. Step 1: Write the proportion equation
   31,311 : 48,490 = 48,490 : x
2. Step 2: Convert to fraction form
   31,311/48,490 = 48,490/x
3. Step 3: Cross multiply
   31,311x = 48,490 × 48,490
4. Step 4: Simplify right side
   31,311x = 2,351,280,100
5. Step 5: Solve for x
   x = 2,351,280,100/31,311
6. Step 6: Final answer
   x = 75,094.38