Finding the Third Proportional to 291,060 and 636,224

Step by Step Solution

1. Step 1: Write the proportion equation
   291,060 : 636,224 = 636,224 : x
2. Step 2: Convert to fraction form
   291,060/636,224 = 636,224/x
3. Step 3: Cross multiply
   291,060x = 636,224 × 636,224
4. Step 4: Simplify right side
   291,060x = 404,780,978,176
5. Step 5: Solve for x
   x = 404,780,978,176/291,060
6. Step 6: Final answer
   x = 1,390,713.18