Finding the Third Proportional to 21,684,240 and 28,908,384

Step by Step Solution

1. Step 1: Write the proportion equation
   21,684,240 : 28,908,384 = 28,908,384 : x
2. Step 2: Convert to fraction form
   21,684,240/28,908,384 = 28,908,384/x
3. Step 3: Cross multiply
   21,684,240x = 28,908,384 × 28,908,384
4. Step 4: Simplify right side
   21,684,240x = 835,694,665,491,456
5. Step 5: Solve for x
   x = 835,694,665,491,456/21,684,240
6. Step 6: Final answer
   x = 38,539,264.71