Finding the Third Proportional to 17,931 and 39,400.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,931 : 39,400.50 = 39,400.50 : x
2. Step 2: Convert to fraction form
   17,931/39,400.50 = 39,400.50/x
3. Step 3: Cross multiply
   17,931x = 39,400.50 × 39,400.50
4. Step 4: Simplify right side
   17,931x = 1,552,399,400.25
5. Step 5: Solve for x
   x = 1,552,399,400.25/17,931
6. Step 6: Final answer
   x = 86,576.29