Finding the Third Proportional to 345,063 and 505,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   345,063 : 505,990.50 = 505,990.50 : x
2. Step 2: Convert to fraction form
   345,063/505,990.50 = 505,990.50/x
3. Step 3: Cross multiply
   345,063x = 505,990.50 × 505,990.50
4. Step 4: Simplify right side
   345,063x = 256,026,386,090.25
5. Step 5: Solve for x
   x = 256,026,386,090.25/345,063
6. Step 6: Final answer
   x = 741,969.98