Finding the Third Proportional to 8,578,140 and 13,068,460

Step by Step Solution

1. Step 1: Write the proportion equation
   8,578,140 : 13,068,460 = 13,068,460 : x
2. Step 2: Convert to fraction form
   8,578,140/13,068,460 = 13,068,460/x
3. Step 3: Cross multiply
   8,578,140x = 13,068,460 × 13,068,460
4. Step 4: Simplify right side
   8,578,140x = 170,784,646,771,600
5. Step 5: Solve for x
   x = 170,784,646,771,600/8,578,140
6. Step 6: Final answer
   x = 19,909,286.49