Finding the Third Proportional to 21,720,680 and 42,893,104

Step by Step Solution

1. Step 1: Write the proportion equation
   21,720,680 : 42,893,104 = 42,893,104 : x
2. Step 2: Convert to fraction form
   21,720,680/42,893,104 = 42,893,104/x
3. Step 3: Cross multiply
   21,720,680x = 42,893,104 × 42,893,104
4. Step 4: Simplify right side
   21,720,680x = 1,839,818,370,754,816
5. Step 5: Solve for x
   x = 1,839,818,370,754,816/21,720,680
6. Step 6: Final answer
   x = 84,703,534.64