Finding the Third Proportional to 4,878,490 and 7,142,774

Step by Step Solution

1. Step 1: Write the proportion equation
   4,878,490 : 7,142,774 = 7,142,774 : x
2. Step 2: Convert to fraction form
   4,878,490/7,142,774 = 7,142,774/x
3. Step 3: Cross multiply
   4,878,490x = 7,142,774 × 7,142,774
4. Step 4: Simplify right side
   4,878,490x = 51,019,220,415,076
5. Step 5: Solve for x
   x = 51,019,220,415,076/4,878,490
6. Step 6: Final answer
   x = 10,457,994.26