Finding the Third Proportional to 78,838,144 and 168,571,648

Step by Step Solution

1. Step 1: Write the proportion equation
   78,838,144 : 168,571,648 = 168,571,648 : x
2. Step 2: Convert to fraction form
   78,838,144/168,571,648 = 168,571,648/x
3. Step 3: Cross multiply
   78,838,144x = 168,571,648 × 168,571,648
4. Step 4: Simplify right side
   78,838,144x = 28,416,400,509,435,904
5. Step 5: Solve for x
   x = 28,416,400,509,435,904/78,838,144
6. Step 6: Final answer
   x = 360,439,744.87