Finding the Third Proportional to 31,399,864,736 and 63,722,398,528

Step by Step Solution

1. Step 1: Write the proportion equation
   31,399,864,736 : 63,722,398,528 = 63,722,398,528 : x
2. Step 2: Convert to fraction form
   31,399,864,736/63,722,398,528 = 63,722,398,528/x
3. Step 3: Cross multiply
   31,399,864,736x = 63,722,398,528 × 63,722,398,528
4. Step 4: Simplify right side
   31,399,864,736x = 4,060,544,074,161,256,398,848
5. Step 5: Solve for x
   x = 4,060,544,074,161,256,398,848/31,399,864,736
6. Step 6: Final answer
   x = 129,317,247,328.96