Finding the Fourth Proportional to 30,978.22, 46,466.56 and 8,791.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,978.22 : 46,466.56 = 8,791.63 : x
2. Step 2: Convert to fraction form
   30,978.22/46,466.56 = 8,791.63/x
3. Step 3: Cross multiply
   30,978.22x = 46,466.56 × 8,791.63
4. Step 4: Simplify right side
   30,978.22x = 408,516,802.89
5. Step 5: Solve for x
   x = 408,516,802.89/30,978.22
6. Step 6: Final answer
   x = 13,187.23