Finding the Third Proportional to 215,811 and 337,828.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,811 : 337,828.50 = 337,828.50 : x
2. Step 2: Convert to fraction form
   215,811/337,828.50 = 337,828.50/x
3. Step 3: Cross multiply
   215,811x = 337,828.50 × 337,828.50
4. Step 4: Simplify right side
   215,811x = 114,128,095,412.25
5. Step 5: Solve for x
   x = 114,128,095,412.25/215,811
6. Step 6: Final answer
   x = 528,833.54