Finding the Fourth Proportional to 30,642.06, 45,962.18 and 8,456.77

Step by Step Solution

1. Step 1: Write the proportion equation
   30,642.06 : 45,962.18 = 8,456.77 : x
2. Step 2: Convert to fraction form
   30,642.06/45,962.18 = 8,456.77/x
3. Step 3: Cross multiply
   30,642.06x = 45,962.18 × 8,456.77
4. Step 4: Simplify right side
   30,642.06x = 388,691,312.86
5. Step 5: Solve for x
   x = 388,691,312.86/30,642.06
6. Step 6: Final answer
   x = 12,684.89