Finding the Third Proportional to 438,642 and 911,749.50

Step by Step Solution

1. Step 1: Write the proportion equation
   438,642 : 911,749.50 = 911,749.50 : x
2. Step 2: Convert to fraction form
   438,642/911,749.50 = 911,749.50/x
3. Step 3: Cross multiply
   438,642x = 911,749.50 × 911,749.50
4. Step 4: Simplify right side
   438,642x = 831,287,150,750.25
5. Step 5: Solve for x
   x = 831,287,150,750.25/438,642
6. Step 6: Final answer
   x = 1,895,138.06