Finding the Third Proportional to 286,009 and 427,501.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,009 : 427,501.50 = 427,501.50 : x
2. Step 2: Convert to fraction form
   286,009/427,501.50 = 427,501.50/x
3. Step 3: Cross multiply
   286,009x = 427,501.50 × 427,501.50
4. Step 4: Simplify right side
   286,009x = 182,757,532,502.25
5. Step 5: Solve for x
   x = 182,757,532,502.25/286,009
6. Step 6: Final answer
   x = 638,992.24