Finding the Third Proportional to 359,920.50 and 787,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,920.50 : 787,434.50 = 787,434.50 : x
2. Step 2: Convert to fraction form
   359,920.50/787,434.50 = 787,434.50/x
3. Step 3: Cross multiply
   359,920.50x = 787,434.50 × 787,434.50
4. Step 4: Simplify right side
   359,920.50x = 620,053,091,790.25
5. Step 5: Solve for x
   x = 620,053,091,790.25/359,920.50
6. Step 6: Final answer
   x = 1,722,750.14