Finding the Third Proportional to 21,320,880 and 31,184,736

Step by Step Solution

1. Step 1: Write the proportion equation
   21,320,880 : 31,184,736 = 31,184,736 : x
2. Step 2: Convert to fraction form
   21,320,880/31,184,736 = 31,184,736/x
3. Step 3: Cross multiply
   21,320,880x = 31,184,736 × 31,184,736
4. Step 4: Simplify right side
   21,320,880x = 972,487,759,389,696
5. Step 5: Solve for x
   x = 972,487,759,389,696/21,320,880
6. Step 6: Final answer
   x = 45,611,989.72