Finding the Third Proportional to 5,479,640 and 8,726,820

Step by Step Solution

1. Step 1: Write the proportion equation
   5,479,640 : 8,726,820 = 8,726,820 : x
2. Step 2: Convert to fraction form
   5,479,640/8,726,820 = 8,726,820/x
3. Step 3: Cross multiply
   5,479,640x = 8,726,820 × 8,726,820
4. Step 4: Simplify right side
   5,479,640x = 76,157,387,312,400
5. Step 5: Solve for x
   x = 76,157,387,312,400/5,479,640
6. Step 6: Final answer
   x = 13,898,246.47