Finding the Third Proportional to 21,684,316 and 28,908,510

Step by Step Solution

1. Step 1: Write the proportion equation
   21,684,316 : 28,908,510 = 28,908,510 : x
2. Step 2: Convert to fraction form
   21,684,316/28,908,510 = 28,908,510/x
3. Step 3: Cross multiply
   21,684,316x = 28,908,510 × 28,908,510
4. Step 4: Simplify right side
   21,684,316x = 835,701,950,420,100
5. Step 5: Solve for x
   x = 835,701,950,420,100/21,684,316
6. Step 6: Final answer
   x = 38,539,465.59