Finding the Third Proportional to 21,978,813 and 32,309,689.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978,813 : 32,309,689.50 = 32,309,689.50 : x
2. Step 2: Convert to fraction form
   21,978,813/32,309,689.50 = 32,309,689.50/x
3. Step 3: Cross multiply
   21,978,813x = 32,309,689.50 × 32,309,689.50
4. Step 4: Simplify right side
   21,978,813x = 1,043,916,035,586,410.25
5. Step 5: Solve for x
   x = 1,043,916,035,586,410.25/21,978,813
6. Step 6: Final answer
   x = 47,496,470.15