Finding the Third Proportional to 643,586.06 and 874,072.69

Step by Step Solution

1. Step 1: Write the proportion equation
   643,586.06 : 874,072.69 = 874,072.69 : x
2. Step 2: Convert to fraction form
   643,586.06/874,072.69 = 874,072.69/x
3. Step 3: Cross multiply
   643,586.06x = 874,072.69 × 874,072.69
4. Step 4: Simplify right side
   643,586.06x = 764,003,063,033.47
5. Step 5: Solve for x
   x = 764,003,063,033.47/643,586.06
6. Step 6: Final answer
   x = 1,187,103.18