Finding the Third Proportional to 300,060 and 638,316

Step by Step Solution

1. Step 1: Write the proportion equation
   300,060 : 638,316 = 638,316 : x
2. Step 2: Convert to fraction form
   300,060/638,316 = 638,316/x
3. Step 3: Cross multiply
   300,060x = 638,316 × 638,316
4. Step 4: Simplify right side
   300,060x = 407,447,315,856
5. Step 5: Solve for x
   x = 407,447,315,856/300,060
6. Step 6: Final answer
   x = 1,357,886.14