Finding the Third Proportional to 308,913 and 493,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,913 : 493,345.50 = 493,345.50 : x
2. Step 2: Convert to fraction form
   308,913/493,345.50 = 493,345.50/x
3. Step 3: Cross multiply
   308,913x = 493,345.50 × 493,345.50
4. Step 4: Simplify right side
   308,913x = 243,389,782,370.25
5. Step 5: Solve for x
   x = 243,389,782,370.25/308,913
6. Step 6: Final answer
   x = 787,891.03