Finding the Fourth Proportional to 15,978.98, 23,968.55 and 4,885.63

Step by Step Solution

1. Step 1: Write the proportion equation
   15,978.98 : 23,968.55 = 4,885.63 : x
2. Step 2: Convert to fraction form
   15,978.98/23,968.55 = 4,885.63/x
3. Step 3: Cross multiply
   15,978.98x = 23,968.55 × 4,885.63
4. Step 4: Simplify right side
   15,978.98x = 117,101,419.23
5. Step 5: Solve for x
   x = 117,101,419.23/15,978.98
6. Step 6: Final answer
   x = 7,328.47