Finding the Third Proportional to 672,138 and 1,064,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   672,138 : 1,064,812.50 = 1,064,812.50 : x
2. Step 2: Convert to fraction form
   672,138/1,064,812.50 = 1,064,812.50/x
3. Step 3: Cross multiply
   672,138x = 1,064,812.50 × 1,064,812.50
4. Step 4: Simplify right side
   672,138x = 1,133,825,660,156.25
5. Step 5: Solve for x
   x = 1,133,825,660,156.25/672,138
6. Step 6: Final answer
   x = 1,686,894.15