Finding the Third Proportional to 188,424 and 410,139

Step by Step Solution

1. Step 1: Write the proportion equation
   188,424 : 410,139 = 410,139 : x
2. Step 2: Convert to fraction form
   188,424/410,139 = 410,139/x
3. Step 3: Cross multiply
   188,424x = 410,139 × 410,139
4. Step 4: Simplify right side
   188,424x = 168,213,999,321
5. Step 5: Solve for x
   x = 168,213,999,321/188,424
6. Step 6: Final answer
   x = 892,741.90