Finding the Third Proportional to 42,931 and 89,781

Step by Step Solution

1. Step 1: Write the proportion equation
   42,931 : 89,781 = 89,781 : x
2. Step 2: Convert to fraction form
   42,931/89,781 = 89,781/x
3. Step 3: Cross multiply
   42,931x = 89,781 × 89,781
4. Step 4: Simplify right side
   42,931x = 8,060,627,961
5. Step 5: Solve for x
   x = 8,060,627,961/42,931
6. Step 6: Final answer
   x = 187,757.75