Finding the Third Proportional to 78,838,150 and 168,571,660

Step by Step Solution

1. Step 1: Write the proportion equation
   78,838,150 : 168,571,660 = 168,571,660 : x
2. Step 2: Convert to fraction form
   78,838,150/168,571,660 = 168,571,660/x
3. Step 3: Cross multiply
   78,838,150x = 168,571,660 × 168,571,660
4. Step 4: Simplify right side
   78,838,150x = 28,416,404,555,155,600
5. Step 5: Solve for x
   x = 28,416,404,555,155,600/78,838,150
6. Step 6: Final answer
   x = 360,439,768.76