Finding the Third Proportional to 308,163 and 432,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,163 : 432,688.50 = 432,688.50 : x
2. Step 2: Convert to fraction form
   308,163/432,688.50 = 432,688.50/x
3. Step 3: Cross multiply
   308,163x = 432,688.50 × 432,688.50
4. Step 4: Simplify right side
   308,163x = 187,219,338,032.25
5. Step 5: Solve for x
   x = 187,219,338,032.25/308,163
6. Step 6: Final answer
   x = 607,533.47