Finding the Fourth Proportional to 19,018.97, 28,530.09 and 4,978.94

Step by Step Solution

1. Step 1: Write the proportion equation
   19,018.97 : 28,530.09 = 4,978.94 : x
2. Step 2: Convert to fraction form
   19,018.97/28,530.09 = 4,978.94/x
3. Step 3: Cross multiply
   19,018.97x = 28,530.09 × 4,978.94
4. Step 4: Simplify right side
   19,018.97x = 142,049,606.30
5. Step 5: Solve for x
   x = 142,049,606.30/19,018.97
6. Step 6: Final answer
   x = 7,468.84