Finding the Third Proportional to 308,889 and 493,309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,889 : 493,309.50 = 493,309.50 : x
2. Step 2: Convert to fraction form
   308,889/493,309.50 = 493,309.50/x
3. Step 3: Cross multiply
   308,889x = 493,309.50 × 493,309.50
4. Step 4: Simplify right side
   308,889x = 243,354,262,790.25
5. Step 5: Solve for x
   x = 243,354,262,790.25/308,889
6. Step 6: Final answer
   x = 787,837.26