Finding the Third Proportional to 139,893 and 221,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,893 : 221,851.50 = 221,851.50 : x
2. Step 2: Convert to fraction form
   139,893/221,851.50 = 221,851.50/x
3. Step 3: Cross multiply
   139,893x = 221,851.50 × 221,851.50
4. Step 4: Simplify right side
   139,893x = 49,218,088,052.25
5. Step 5: Solve for x
   x = 49,218,088,052.25/139,893
6. Step 6: Final answer
   x = 351,826.67