Finding the Third Proportional to 4,878,480 and 7,142,760

Step by Step Solution

1. Step 1: Write the proportion equation
   4,878,480 : 7,142,760 = 7,142,760 : x
2. Step 2: Convert to fraction form
   4,878,480/7,142,760 = 7,142,760/x
3. Step 3: Cross multiply
   4,878,480x = 7,142,760 × 7,142,760
4. Step 4: Simplify right side
   4,878,480x = 51,019,020,417,600
5. Step 5: Solve for x
   x = 51,019,020,417,600/4,878,480
6. Step 6: Final answer
   x = 10,457,974.70