Finding the Third Proportional to 308,119.50 and 460,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,119.50 : 460,111.50 = 460,111.50 : x
2. Step 2: Convert to fraction form
   308,119.50/460,111.50 = 460,111.50/x
3. Step 3: Cross multiply
   308,119.50x = 460,111.50 × 460,111.50
4. Step 4: Simplify right side
   308,119.50x = 211,702,592,432.25
5. Step 5: Solve for x
   x = 211,702,592,432.25/308,119.50
6. Step 6: Final answer
   x = 687,079.50