Finding the Third Proportional to 57,484 and 85,872

Step by Step Solution

1. Step 1: Write the proportion equation
   57,484 : 85,872 = 85,872 : x
2. Step 2: Convert to fraction form
   57,484/85,872 = 85,872/x
3. Step 3: Cross multiply
   57,484x = 85,872 × 85,872
4. Step 4: Simplify right side
   57,484x = 7,374,000,384
5. Step 5: Solve for x
   x = 7,374,000,384/57,484
6. Step 6: Final answer
   x = 128,279.18