Finding the Third Proportional to 133,054 and 287,210

Step by Step Solution

1. Step 1: Write the proportion equation
   133,054 : 287,210 = 287,210 : x
2. Step 2: Convert to fraction form
   133,054/287,210 = 287,210/x
3. Step 3: Cross multiply
   133,054x = 287,210 × 287,210
4. Step 4: Simplify right side
   133,054x = 82,489,584,100
5. Step 5: Solve for x
   x = 82,489,584,100/133,054
6. Step 6: Final answer
   x = 619,970.72