Finding the Third Proportional to 31,407,621 and 69,015,042

Step by Step Solution

1. Step 1: Write the proportion equation
   31,407,621 : 69,015,042 = 69,015,042 : x
2. Step 2: Convert to fraction form
   31,407,621/69,015,042 = 69,015,042/x
3. Step 3: Cross multiply
   31,407,621x = 69,015,042 × 69,015,042
4. Step 4: Simplify right side
   31,407,621x = 4,763,076,022,261,764
5. Step 5: Solve for x
   x = 4,763,076,022,261,764/31,407,621
6. Step 6: Final answer
   x = 151,653,511.81