Finding the Third Proportional to 21,720,681 and 42,893,106

Step by Step Solution

1. Step 1: Write the proportion equation
   21,720,681 : 42,893,106 = 42,893,106 : x
2. Step 2: Convert to fraction form
   21,720,681/42,893,106 = 42,893,106/x
3. Step 3: Cross multiply
   21,720,681x = 42,893,106 × 42,893,106
4. Step 4: Simplify right side
   21,720,681x = 1,839,818,542,327,236
5. Step 5: Solve for x
   x = 1,839,818,542,327,236/21,720,681
6. Step 6: Final answer
   x = 84,703,538.64