Finding the Third Proportional to 19,429.50 and 42,318.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,429.50 : 42,318.75 = 42,318.75 : x
2. Step 2: Convert to fraction form
   19,429.50/42,318.75 = 42,318.75/x
3. Step 3: Cross multiply
   19,429.50x = 42,318.75 × 42,318.75
4. Step 4: Simplify right side
   19,429.50x = 1,790,876,601.56
5. Step 5: Solve for x
   x = 1,790,876,601.56/19,429.50
6. Step 6: Final answer
   x = 92,173.07