Finding the Third Proportional to 393,680 and 610,752

Step by Step Solution

1. Step 1: Write the proportion equation
   393,680 : 610,752 = 610,752 : x
2. Step 2: Convert to fraction form
   393,680/610,752 = 610,752/x
3. Step 3: Cross multiply
   393,680x = 610,752 × 610,752
4. Step 4: Simplify right side
   393,680x = 373,018,005,504
5. Step 5: Solve for x
   x = 373,018,005,504/393,680
6. Step 6: Final answer
   x = 947,515.76