Finding the Third Proportional to 13,890.19 and 30,561.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,890.19 : 30,561.38 = 30,561.38 : x
2. Step 2: Convert to fraction form
   13,890.19/30,561.38 = 30,561.38/x
3. Step 3: Cross multiply
   13,890.19x = 30,561.38 × 30,561.38
4. Step 4: Simplify right side
   13,890.19x = 933,997,641.89
5. Step 5: Solve for x
   x = 933,997,641.89/13,890.19
6. Step 6: Final answer
   x = 67,241.54