Finding the Third Proportional to 31,243,488 and 64,009,128

Step by Step Solution

1. Step 1: Write the proportion equation
   31,243,488 : 64,009,128 = 64,009,128 : x
2. Step 2: Convert to fraction form
   31,243,488/64,009,128 = 64,009,128/x
3. Step 3: Cross multiply
   31,243,488x = 64,009,128 × 64,009,128
4. Step 4: Simplify right side
   31,243,488x = 4,097,168,467,320,384
5. Step 5: Solve for x
   x = 4,097,168,467,320,384/31,243,488
6. Step 6: Final answer
   x = 131,136,717.75