Finding the Third Proportional to 387,222.38 and 838,800

Step by Step Solution

1. Step 1: Write the proportion equation
   387,222.38 : 838,800 = 838,800 : x
2. Step 2: Convert to fraction form
   387,222.38/838,800 = 838,800/x
3. Step 3: Cross multiply
   387,222.38x = 838,800 × 838,800
4. Step 4: Simplify right side
   387,222.38x = 703,585,440,000
5. Step 5: Solve for x
   x = 703,585,440,000/387,222.38
6. Step 6: Final answer
   x = 1,817,006.16