Finding the Third Proportional to 638,598 and 1,064,289

Step by Step Solution

1. Step 1: Write the proportion equation
   638,598 : 1,064,289 = 1,064,289 : x
2. Step 2: Convert to fraction form
   638,598/1,064,289 = 1,064,289/x
3. Step 3: Cross multiply
   638,598x = 1,064,289 × 1,064,289
4. Step 4: Simplify right side
   638,598x = 1,132,711,075,521
5. Step 5: Solve for x
   x = 1,132,711,075,521/638,598
6. Step 6: Final answer
   x = 1,773,746.67