Finding the Third Proportional to 387,267 and 838,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,267 : 838,870.50 = 838,870.50 : x
2. Step 2: Convert to fraction form
   387,267/838,870.50 = 838,870.50/x
3. Step 3: Cross multiply
   387,267x = 838,870.50 × 838,870.50
4. Step 4: Simplify right side
   387,267x = 703,703,715,770.25
5. Step 5: Solve for x
   x = 703,703,715,770.25/387,267
6. Step 6: Final answer
   x = 1,817,102.20