Finding the Third Proportional to 42,859,738 and 64,688,189

Step by Step Solution

1. Step 1: Write the proportion equation
   42,859,738 : 64,688,189 = 64,688,189 : x
2. Step 2: Convert to fraction form
   42,859,738/64,688,189 = 64,688,189/x
3. Step 3: Cross multiply
   42,859,738x = 64,688,189 × 64,688,189
4. Step 4: Simplify right side
   42,859,738x = 4,184,561,796,099,721
5. Step 5: Solve for x
   x = 4,184,561,796,099,721/42,859,738
6. Step 6: Final answer
   x = 97,633,863.19