Finding the Third Proportional to 575,439.75 and 871,155

Step by Step Solution

1. Step 1: Write the proportion equation
   575,439.75 : 871,155 = 871,155 : x
2. Step 2: Convert to fraction form
   575,439.75/871,155 = 871,155/x
3. Step 3: Cross multiply
   575,439.75x = 871,155 × 871,155
4. Step 4: Simplify right side
   575,439.75x = 758,911,034,025
5. Step 5: Solve for x
   x = 758,911,034,025/575,439.75
6. Step 6: Final answer
   x = 1,318,836.65