Finding the Third Proportional to 188,172 and 402,240

Step by Step Solution

1. Step 1: Write the proportion equation
   188,172 : 402,240 = 402,240 : x
2. Step 2: Convert to fraction form
   188,172/402,240 = 402,240/x
3. Step 3: Cross multiply
   188,172x = 402,240 × 402,240
4. Step 4: Simplify right side
   188,172x = 161,797,017,600
5. Step 5: Solve for x
   x = 161,797,017,600/188,172
6. Step 6: Final answer
   x = 859,835.78