Finding the Third Proportional to 438,588 and 911,650.50

Step by Step Solution

1. Step 1: Write the proportion equation
   438,588 : 911,650.50 = 911,650.50 : x
2. Step 2: Convert to fraction form
   438,588/911,650.50 = 911,650.50/x
3. Step 3: Cross multiply
   438,588x = 911,650.50 × 911,650.50
4. Step 4: Simplify right side
   438,588x = 831,106,634,150.25
5. Step 5: Solve for x
   x = 831,106,634,150.25/438,588
6. Step 6: Final answer
   x = 1,894,959.81