Finding the Third Proportional to 11,557.69 and 30,154.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,557.69 : 30,154.78 = 30,154.78 : x
2. Step 2: Convert to fraction form
   11,557.69/30,154.78 = 30,154.78/x
3. Step 3: Cross multiply
   11,557.69x = 30,154.78 × 30,154.78
4. Step 4: Simplify right side
   11,557.69x = 909,310,832.24
5. Step 5: Solve for x
   x = 909,310,832.24/11,557.69
6. Step 6: Final answer
   x = 78,675.85