Finding the Third Proportional to 13,931 and 30,624.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,931 : 30,624.50 = 30,624.50 : x
2. Step 2: Convert to fraction form
   13,931/30,624.50 = 30,624.50/x
3. Step 3: Cross multiply
   13,931x = 30,624.50 × 30,624.50
4. Step 4: Simplify right side
   13,931x = 937,860,000.25
5. Step 5: Solve for x
   x = 937,860,000.25/13,931
6. Step 6: Final answer
   x = 67,321.80