Finding the Third Proportional to 38,420 and 56,160

Step by Step Solution

1. Step 1: Write the proportion equation
   38,420 : 56,160 = 56,160 : x
2. Step 2: Convert to fraction form
   38,420/56,160 = 56,160/x
3. Step 3: Cross multiply
   38,420x = 56,160 × 56,160
4. Step 4: Simplify right side
   38,420x = 3,153,945,600
5. Step 5: Solve for x
   x = 3,153,945,600/38,420
6. Step 6: Final answer
   x = 82,091.24