Finding the Third Proportional to 3,499,580 and 7,278,516

Step by Step Solution

1. Step 1: Write the proportion equation
   3,499,580 : 7,278,516 = 7,278,516 : x
2. Step 2: Convert to fraction form
   3,499,580/7,278,516 = 7,278,516/x
3. Step 3: Cross multiply
   3,499,580x = 7,278,516 × 7,278,516
4. Step 4: Simplify right side
   3,499,580x = 52,976,795,162,256
5. Step 5: Solve for x
   x = 52,976,795,162,256/3,499,580
6. Step 6: Final answer
   x = 15,138,043.75