Finding the Third Proportional to 578,363.25 and 864,142.88

Step by Step Solution

1. Step 1: Write the proportion equation
   578,363.25 : 864,142.88 = 864,142.88 : x
2. Step 2: Convert to fraction form
   578,363.25/864,142.88 = 864,142.88/x
3. Step 3: Cross multiply
   578,363.25x = 864,142.88 × 864,142.88
4. Step 4: Simplify right side
   578,363.25x = 746,742,908,413.27
5. Step 5: Solve for x
   x = 746,742,908,413.27/578,363.25
6. Step 6: Final answer
   x = 1,291,131.32