Finding the Third Proportional to 388,071 and 579,712.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,071 : 579,712.50 = 579,712.50 : x
2. Step 2: Convert to fraction form
   388,071/579,712.50 = 579,712.50/x
3. Step 3: Cross multiply
   388,071x = 579,712.50 × 579,712.50
4. Step 4: Simplify right side
   388,071x = 336,066,582,656.25
5. Step 5: Solve for x
   x = 336,066,582,656.25/388,071
6. Step 6: Final answer
   x = 865,992.52