Finding the Third Proportional to 56,171 and 85,410

Step by Step Solution

1. Step 1: Write the proportion equation
   56,171 : 85,410 = 85,410 : x
2. Step 2: Convert to fraction form
   56,171/85,410 = 85,410/x
3. Step 3: Cross multiply
   56,171x = 85,410 × 85,410
4. Step 4: Simplify right side
   56,171x = 7,294,868,100
5. Step 5: Solve for x
   x = 7,294,868,100/56,171
6. Step 6: Final answer
   x = 129,868.94