Finding the Third Proportional to 13,620 and 30,159

Step by Step Solution

1. Step 1: Write the proportion equation
   13,620 : 30,159 = 30,159 : x
2. Step 2: Convert to fraction form
   13,620/30,159 = 30,159/x
3. Step 3: Cross multiply
   13,620x = 30,159 × 30,159
4. Step 4: Simplify right side
   13,620x = 909,565,281
5. Step 5: Solve for x
   x = 909,565,281/13,620
6. Step 6: Final answer
   x = 66,781.59