Finding the Third Proportional to 31,230 and 42,225

Step by Step Solution

1. Step 1: Write the proportion equation
   31,230 : 42,225 = 42,225 : x
2. Step 2: Convert to fraction form
   31,230/42,225 = 42,225/x
3. Step 3: Cross multiply
   31,230x = 42,225 × 42,225
4. Step 4: Simplify right side
   31,230x = 1,782,950,625
5. Step 5: Solve for x
   x = 1,782,950,625/31,230
6. Step 6: Final answer
   x = 57,090.96