Finding the Fourth Proportional to 19,930.58, 27,503.79 and 10,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,930.58 : 27,503.79 = 10,978.25 : x
2. Step 2: Convert to fraction form
   19,930.58/27,503.79 = 10,978.25/x
3. Step 3: Cross multiply
   19,930.58x = 27,503.79 × 10,978.25
4. Step 4: Simplify right side
   19,930.58x = 301,943,345.05
5. Step 5: Solve for x
   x = 301,943,345.05/19,930.58
6. Step 6: Final answer
   x = 15,149.76