Finding the Third Proportional to 21,087,864 and 43,435,116

Step by Step Solution

1. Step 1: Write the proportion equation
   21,087,864 : 43,435,116 = 43,435,116 : x
2. Step 2: Convert to fraction form
   21,087,864/43,435,116 = 43,435,116/x
3. Step 3: Cross multiply
   21,087,864x = 43,435,116 × 43,435,116
4. Step 4: Simplify right side
   21,087,864x = 1,886,609,301,933,456
5. Step 5: Solve for x
   x = 1,886,609,301,933,456/21,087,864
6. Step 6: Final answer
   x = 89,464,219.89