Finding the Third Proportional to 21,720,679 and 42,893,102

Step by Step Solution

1. Step 1: Write the proportion equation
   21,720,679 : 42,893,102 = 42,893,102 : x
2. Step 2: Convert to fraction form
   21,720,679/42,893,102 = 42,893,102/x
3. Step 3: Cross multiply
   21,720,679x = 42,893,102 × 42,893,102
4. Step 4: Simplify right side
   21,720,679x = 1,839,818,199,182,404
5. Step 5: Solve for x
   x = 1,839,818,199,182,404/21,720,679
6. Step 6: Final answer
   x = 84,703,530.64