Finding the Third Proportional to 56,171 and 85,412.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,171 : 85,412.50 = 85,412.50 : x
2. Step 2: Convert to fraction form
   56,171/85,412.50 = 85,412.50/x
3. Step 3: Cross multiply
   56,171x = 85,412.50 × 85,412.50
4. Step 4: Simplify right side
   56,171x = 7,295,295,156.25
5. Step 5: Solve for x
   x = 7,295,295,156.25/56,171
6. Step 6: Final answer
   x = 129,876.54