Finding the Third Proportional to 131,980 and 287,781

Step by Step Solution

1. Step 1: Write the proportion equation
   131,980 : 287,781 = 287,781 : x
2. Step 2: Convert to fraction form
   131,980/287,781 = 287,781/x
3. Step 3: Cross multiply
   131,980x = 287,781 × 287,781
4. Step 4: Simplify right side
   131,980x = 82,817,903,961
5. Step 5: Solve for x
   x = 82,817,903,961/131,980
6. Step 6: Final answer
   x = 627,503.44