Finding the Third Proportional to 64,982,630 and 142,717,978

Step by Step Solution

1. Step 1: Write the proportion equation
   64,982,630 : 142,717,978 = 142,717,978 : x
2. Step 2: Convert to fraction form
   64,982,630/142,717,978 = 142,717,978/x
3. Step 3: Cross multiply
   64,982,630x = 142,717,978 × 142,717,978
4. Step 4: Simplify right side
   64,982,630x = 20,368,421,244,408,484
5. Step 5: Solve for x
   x = 20,368,421,244,408,484/64,982,630
6. Step 6: Final answer
   x = 313,444,088.74