Finding the Third Proportional to 31,602 and 42,405

Step by Step Solution

1. Step 1: Write the proportion equation
   31,602 : 42,405 = 42,405 : x
2. Step 2: Convert to fraction form
   31,602/42,405 = 42,405/x
3. Step 3: Cross multiply
   31,602x = 42,405 × 42,405
4. Step 4: Simplify right side
   31,602x = 1,798,184,025
5. Step 5: Solve for x
   x = 1,798,184,025/31,602
6. Step 6: Final answer
   x = 56,900.96