Finding the Third Proportional to 388,063 and 579,700.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,063 : 579,700.50 = 579,700.50 : x
2. Step 2: Convert to fraction form
   388,063/579,700.50 = 579,700.50/x
3. Step 3: Cross multiply
   388,063x = 579,700.50 × 579,700.50
4. Step 4: Simplify right side
   388,063x = 336,052,669,700.25
5. Step 5: Solve for x
   x = 336,052,669,700.25/388,063
6. Step 6: Final answer
   x = 865,974.52