Finding the Third Proportional to 57,878,064 and 89,578,062

Step by Step Solution

1. Step 1: Write the proportion equation
   57,878,064 : 89,578,062 = 89,578,062 : x
2. Step 2: Convert to fraction form
   57,878,064/89,578,062 = 89,578,062/x
3. Step 3: Cross multiply
   57,878,064x = 89,578,062 × 89,578,062
4. Step 4: Simplify right side
   57,878,064x = 8,024,229,191,675,844
5. Step 5: Solve for x
   x = 8,024,229,191,675,844/57,878,064
6. Step 6: Final answer
   x = 138,640,248.78