Finding the Third Proportional to 518,345 and 846,409.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,345 : 846,409.50 = 846,409.50 : x
2. Step 2: Convert to fraction form
   518,345/846,409.50 = 846,409.50/x
3. Step 3: Cross multiply
   518,345x = 846,409.50 × 846,409.50
4. Step 4: Simplify right side
   518,345x = 716,409,041,690.25
5. Step 5: Solve for x
   x = 716,409,041,690.25/518,345
6. Step 6: Final answer
   x = 1,382,108.52