Finding the Third Proportional to 361,638.50 and 787,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   361,638.50 : 787,567.50 = 787,567.50 : x
2. Step 2: Convert to fraction form
   361,638.50/787,567.50 = 787,567.50/x
3. Step 3: Cross multiply
   361,638.50x = 787,567.50 × 787,567.50
4. Step 4: Simplify right side
   361,638.50x = 620,262,567,056.25
5. Step 5: Solve for x
   x = 620,262,567,056.25/361,638.50
6. Step 6: Final answer
   x = 1,715,145.28