Finding the Third Proportional to 386,410.50 and 853,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   386,410.50 : 853,087.50 = 853,087.50 : x
2. Step 2: Convert to fraction form
   386,410.50/853,087.50 = 853,087.50/x
3. Step 3: Cross multiply
   386,410.50x = 853,087.50 × 853,087.50
4. Step 4: Simplify right side
   386,410.50x = 727,758,282,656.25
5. Step 5: Solve for x
   x = 727,758,282,656.25/386,410.50
6. Step 6: Final answer
   x = 1,883,381.23