Finding the Third Proportional to 55,160 and 87,384

Step by Step Solution

1. Step 1: Write the proportion equation
   55,160 : 87,384 = 87,384 : x
2. Step 2: Convert to fraction form
   55,160/87,384 = 87,384/x
3. Step 3: Cross multiply
   55,160x = 87,384 × 87,384
4. Step 4: Simplify right side
   55,160x = 7,635,963,456
5. Step 5: Solve for x
   x = 7,635,963,456/55,160
6. Step 6: Final answer
   x = 138,432.99