Finding the Third Proportional to 5,639,680 and 8,039,616

Step by Step Solution

1. Step 1: Write the proportion equation
   5,639,680 : 8,039,616 = 8,039,616 : x
2. Step 2: Convert to fraction form
   5,639,680/8,039,616 = 8,039,616/x
3. Step 3: Cross multiply
   5,639,680x = 8,039,616 × 8,039,616
4. Step 4: Simplify right side
   5,639,680x = 64,635,425,427,456
5. Step 5: Solve for x
   x = 64,635,425,427,456/5,639,680
6. Step 6: Final answer
   x = 11,460,832.07