Finding the Third Proportional to 21,385,490 and 43,904,686

Step by Step Solution

1. Step 1: Write the proportion equation
   21,385,490 : 43,904,686 = 43,904,686 : x
2. Step 2: Convert to fraction form
   21,385,490/43,904,686 = 43,904,686/x
3. Step 3: Cross multiply
   21,385,490x = 43,904,686 × 43,904,686
4. Step 4: Simplify right side
   21,385,490x = 1,927,621,452,758,596
5. Step 5: Solve for x
   x = 1,927,621,452,758,596/21,385,490
6. Step 6: Final answer
   x = 90,136,885.00