Finding the Third Proportional to 19,931.50 and 42,293

Step by Step Solution

1. Step 1: Write the proportion equation
   19,931.50 : 42,293 = 42,293 : x
2. Step 2: Convert to fraction form
   19,931.50/42,293 = 42,293/x
3. Step 3: Cross multiply
   19,931.50x = 42,293 × 42,293
4. Step 4: Simplify right side
   19,931.50x = 1,788,697,849
5. Step 5: Solve for x
   x = 1,788,697,849/19,931.50
6. Step 6: Final answer
   x = 89,742.26