Finding the Third Proportional to 4,878,472 and 7,142,748

Step by Step Solution

1. Step 1: Write the proportion equation
   4,878,472 : 7,142,748 = 7,142,748 : x
2. Step 2: Convert to fraction form
   4,878,472/7,142,748 = 7,142,748/x
3. Step 3: Cross multiply
   4,878,472x = 7,142,748 × 7,142,748
4. Step 4: Simplify right side
   4,878,472x = 51,018,848,991,504
5. Step 5: Solve for x
   x = 51,018,848,991,504/4,878,472
6. Step 6: Final answer
   x = 10,457,956.71