Finding the Third Proportional to 17,621.50 and 38,731.75

Step by Step Solution

1. Step 1: Write the proportion equation
   17,621.50 : 38,731.75 = 38,731.75 : x
2. Step 2: Convert to fraction form
   17,621.50/38,731.75 = 38,731.75/x
3. Step 3: Cross multiply
   17,621.50x = 38,731.75 × 38,731.75
4. Step 4: Simplify right side
   17,621.50x = 1,500,148,458.06
5. Step 5: Solve for x
   x = 1,500,148,458.06/17,621.50
6. Step 6: Final answer
   x = 85,131.71