Finding the Third Proportional to 21,087,868 and 43,435,124

Step by Step Solution

1. Step 1: Write the proportion equation
   21,087,868 : 43,435,124 = 43,435,124 : x
2. Step 2: Convert to fraction form
   21,087,868/43,435,124 = 43,435,124/x
3. Step 3: Cross multiply
   21,087,868x = 43,435,124 × 43,435,124
4. Step 4: Simplify right side
   21,087,868x = 1,886,609,996,895,376
5. Step 5: Solve for x
   x = 1,886,609,996,895,376/21,087,868
6. Step 6: Final answer
   x = 89,464,235.88