Finding the Third Proportional to 42,381 and 58,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,381 : 58,171.50 = 58,171.50 : x
2. Step 2: Convert to fraction form
   42,381/58,171.50 = 58,171.50/x
3. Step 3: Cross multiply
   42,381x = 58,171.50 × 58,171.50
4. Step 4: Simplify right side
   42,381x = 3,383,923,412.25
5. Step 5: Solve for x
   x = 3,383,923,412.25/42,381
6. Step 6: Final answer
   x = 79,845.29