Finding the Third Proportional to 578,507.50 and 1,256,521.50

Step by Step Solution

1. Step 1: Write the proportion equation
   578,507.50 : 1,256,521.50 = 1,256,521.50 : x
2. Step 2: Convert to fraction form
   578,507.50/1,256,521.50 = 1,256,521.50/x
3. Step 3: Cross multiply
   578,507.50x = 1,256,521.50 × 1,256,521.50
4. Step 4: Simplify right side
   578,507.50x = 1,578,846,279,962.25
5. Step 5: Solve for x
   x = 1,578,846,279,962.25/578,507.50
6. Step 6: Final answer
   x = 2,729,171.67