Finding the Third Proportional to 1,239,621 and 1,915,495.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,239,621 : 1,915,495.50 = 1,915,495.50 : x
2. Step 2: Convert to fraction form
   1,239,621/1,915,495.50 = 1,915,495.50/x
3. Step 3: Cross multiply
   1,239,621x = 1,915,495.50 × 1,915,495.50
4. Step 4: Simplify right side
   1,239,621x = 3,669,123,010,520.25
5. Step 5: Solve for x
   x = 3,669,123,010,520.25/1,239,621
6. Step 6: Final answer
   x = 2,959,874.84