Finding the Fourth Proportional to 19,930.12, 27,503.24 and 10,978.46

Step by Step Solution

1. Step 1: Write the proportion equation
   19,930.12 : 27,503.24 = 10,978.46 : x
2. Step 2: Convert to fraction form
   19,930.12/27,503.24 = 10,978.46/x
3. Step 3: Cross multiply
   19,930.12x = 27,503.24 × 10,978.46
4. Step 4: Simplify right side
   19,930.12x = 301,943,123.14
5. Step 5: Solve for x
   x = 301,943,123.14/19,930.12
6. Step 6: Final answer
   x = 15,150.09