Finding the Third Proportional to 91,919,232 and 139,788,720

Step by Step Solution

1. Step 1: Write the proportion equation
   91,919,232 : 139,788,720 = 139,788,720 : x
2. Step 2: Convert to fraction form
   91,919,232/139,788,720 = 139,788,720/x
3. Step 3: Cross multiply
   91,919,232x = 139,788,720 × 139,788,720
4. Step 4: Simplify right side
   91,919,232x = 19,540,886,239,238,400
5. Step 5: Solve for x
   x = 19,540,886,239,238,400/91,919,232
6. Step 6: Final answer
   x = 212,587,570.78