Finding the Third Proportional to 4,118,730 and 8,578,340

Step by Step Solution

1. Step 1: Write the proportion equation
   4,118,730 : 8,578,340 = 8,578,340 : x
2. Step 2: Convert to fraction form
   4,118,730/8,578,340 = 8,578,340/x
3. Step 3: Cross multiply
   4,118,730x = 8,578,340 × 8,578,340
4. Step 4: Simplify right side
   4,118,730x = 73,587,917,155,600
5. Step 5: Solve for x
   x = 73,587,917,155,600/4,118,730
6. Step 6: Final answer
   x = 17,866,652.38