Finding the Third Proportional to 747,688 and 1,640,120

Step by Step Solution

1. Step 1: Write the proportion equation
   747,688 : 1,640,120 = 1,640,120 : x
2. Step 2: Convert to fraction form
   747,688/1,640,120 = 1,640,120/x
3. Step 3: Cross multiply
   747,688x = 1,640,120 × 1,640,120
4. Step 4: Simplify right side
   747,688x = 2,689,993,614,400
5. Step 5: Solve for x
   x = 2,689,993,614,400/747,688
6. Step 6: Final answer
   x = 3,597,748.81