Finding the Third Proportional to 279,072 and 612,817.88

Step by Step Solution

1. Step 1: Write the proportion equation
   279,072 : 612,817.88 = 612,817.88 : x
2. Step 2: Convert to fraction form
   279,072/612,817.88 = 612,817.88/x
3. Step 3: Cross multiply
   279,072x = 612,817.88 × 612,817.88
4. Step 4: Simplify right side
   279,072x = 375,545,747,919.52
5. Step 5: Solve for x
   x = 375,545,747,919.52/279,072
6. Step 6: Final answer
   x = 1,345,694.83