Finding the Third Proportional to 16,263,312 and 21,681,408

Step by Step Solution

1. Step 1: Write the proportion equation
   16,263,312 : 21,681,408 = 21,681,408 : x
2. Step 2: Convert to fraction form
   16,263,312/21,681,408 = 21,681,408/x
3. Step 3: Cross multiply
   16,263,312x = 21,681,408 × 21,681,408
4. Step 4: Simplify right side
   16,263,312x = 470,083,452,862,464
5. Step 5: Solve for x
   x = 470,083,452,862,464/16,263,312
6. Step 6: Final answer
   x = 28,904,533.89