Finding the Third Proportional to 389,124 and 838,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,124 : 838,255.50 = 838,255.50 : x
2. Step 2: Convert to fraction form
   389,124/838,255.50 = 838,255.50/x
3. Step 3: Cross multiply
   389,124x = 838,255.50 × 838,255.50
4. Step 4: Simplify right side
   389,124x = 702,672,283,280.25
5. Step 5: Solve for x
   x = 702,672,283,280.25/389,124
6. Step 6: Final answer
   x = 1,805,779.86