Finding the Third Proportional to 624,499.75 and 1,298,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   624,499.75 : 1,298,087.50 = 1,298,087.50 : x
2. Step 2: Convert to fraction form
   624,499.75/1,298,087.50 = 1,298,087.50/x
3. Step 3: Cross multiply
   624,499.75x = 1,298,087.50 × 1,298,087.50
4. Step 4: Simplify right side
   624,499.75x = 1,685,031,157,656.25
5. Step 5: Solve for x
   x = 1,685,031,157,656.25/624,499.75
6. Step 6: Final answer
   x = 2,698,209.50