Finding the Third Proportional to 379,431 and 839,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   379,431 : 839,200.50 = 839,200.50 : x
2. Step 2: Convert to fraction form
   379,431/839,200.50 = 839,200.50/x
3. Step 3: Cross multiply
   379,431x = 839,200.50 × 839,200.50
4. Step 4: Simplify right side
   379,431x = 704,257,479,200.25
5. Step 5: Solve for x
   x = 704,257,479,200.25/379,431
6. Step 6: Final answer
   x = 1,856,088.40