Finding the Third Proportional to 4,601,258 and 9,678,340

Step by Step Solution

1. Step 1: Write the proportion equation
   4,601,258 : 9,678,340 = 9,678,340 : x
2. Step 2: Convert to fraction form
   4,601,258/9,678,340 = 9,678,340/x
3. Step 3: Cross multiply
   4,601,258x = 9,678,340 × 9,678,340
4. Step 4: Simplify right side
   4,601,258x = 93,670,265,155,600
5. Step 5: Solve for x
   x = 93,670,265,155,600/4,601,258
6. Step 6: Final answer
   x = 20,357,533.78