Finding the Third Proportional to 638,628 and 1,064,335.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,628 : 1,064,335.50 = 1,064,335.50 : x
2. Step 2: Convert to fraction form
   638,628/1,064,335.50 = 1,064,335.50/x
3. Step 3: Cross multiply
   638,628x = 1,064,335.50 × 1,064,335.50
4. Step 4: Simplify right side
   638,628x = 1,132,810,056,560.25
5. Step 5: Solve for x
   x = 1,132,810,056,560.25/638,628
6. Step 6: Final answer
   x = 1,773,818.34