Finding the Third Proportional to 4,200,360 and 9,160,940

Step by Step Solution

1. Step 1: Write the proportion equation
   4,200,360 : 9,160,940 = 9,160,940 : x
2. Step 2: Convert to fraction form
   4,200,360/9,160,940 = 9,160,940/x
3. Step 3: Cross multiply
   4,200,360x = 9,160,940 × 9,160,940
4. Step 4: Simplify right side
   4,200,360x = 83,922,821,683,600
5. Step 5: Solve for x
   x = 83,922,821,683,600/4,200,360
6. Step 6: Final answer
   x = 19,979,911.65