Finding the Third Proportional to 56,519 and 85,506

Step by Step Solution

1. Step 1: Write the proportion equation
   56,519 : 85,506 = 85,506 : x
2. Step 2: Convert to fraction form
   56,519/85,506 = 85,506/x
3. Step 3: Cross multiply
   56,519x = 85,506 × 85,506
4. Step 4: Simplify right side
   56,519x = 7,311,276,036
5. Step 5: Solve for x
   x = 7,311,276,036/56,519
6. Step 6: Final answer
   x = 129,359.61