Finding the Third Proportional to 133,012 and 287,126

Step by Step Solution

1. Step 1: Write the proportion equation
   133,012 : 287,126 = 287,126 : x
2. Step 2: Convert to fraction form
   133,012/287,126 = 287,126/x
3. Step 3: Cross multiply
   133,012x = 287,126 × 287,126
4. Step 4: Simplify right side
   133,012x = 82,441,339,876
5. Step 5: Solve for x
   x = 82,441,339,876/133,012
6. Step 6: Final answer
   x = 619,803.78