Finding the Third Proportional to 646,238.25 and 1,380,442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   646,238.25 : 1,380,442.50 = 1,380,442.50 : x
2. Step 2: Convert to fraction form
   646,238.25/1,380,442.50 = 1,380,442.50/x
3. Step 3: Cross multiply
   646,238.25x = 1,380,442.50 × 1,380,442.50
4. Step 4: Simplify right side
   646,238.25x = 1,905,621,495,806.25
5. Step 5: Solve for x
   x = 1,905,621,495,806.25/646,238.25
6. Step 6: Final answer
   x = 2,948,790.94