Finding the Third Proportional to 359,946 and 787,680

Step by Step Solution

1. Step 1: Write the proportion equation
   359,946 : 787,680 = 787,680 : x
2. Step 2: Convert to fraction form
   359,946/787,680 = 787,680/x
3. Step 3: Cross multiply
   359,946x = 787,680 × 787,680
4. Step 4: Simplify right side
   359,946x = 620,439,782,400
5. Step 5: Solve for x
   x = 620,439,782,400/359,946
6. Step 6: Final answer
   x = 1,723,702.40