Finding the Third Proportional to 359,929.50 and 787,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,929.50 : 787,656.50 = 787,656.50 : x
2. Step 2: Convert to fraction form
   359,929.50/787,656.50 = 787,656.50/x
3. Step 3: Cross multiply
   359,929.50x = 787,656.50 × 787,656.50
4. Step 4: Simplify right side
   359,929.50x = 620,402,761,992.25
5. Step 5: Solve for x
   x = 620,402,761,992.25/359,929.50
6. Step 6: Final answer
   x = 1,723,678.56