Finding the Third Proportional to 388,399.50 and 830,770.88

Step by Step Solution

1. Step 1: Write the proportion equation
   388,399.50 : 830,770.88 = 830,770.88 : x
2. Step 2: Convert to fraction form
   388,399.50/830,770.88 = 830,770.88/x
3. Step 3: Cross multiply
   388,399.50x = 830,770.88 × 830,770.88
4. Step 4: Simplify right side
   388,399.50x = 690,180,246,748.27
5. Step 5: Solve for x
   x = 690,180,246,748.27/388,399.50
6. Step 6: Final answer
   x = 1,776,985.42