Finding the Third Proportional to 518,578 and 846,784

Step by Step Solution

1. Step 1: Write the proportion equation
   518,578 : 846,784 = 846,784 : x
2. Step 2: Convert to fraction form
   518,578/846,784 = 846,784/x
3. Step 3: Cross multiply
   518,578x = 846,784 × 846,784
4. Step 4: Simplify right side
   518,578x = 717,043,142,656
5. Step 5: Solve for x
   x = 717,043,142,656/518,578
6. Step 6: Final answer
   x = 1,382,710.30