Finding the Fourth Proportional to 19,931.01, 27,504.49 and 10,978.53

Step by Step Solution

1. Step 1: Write the proportion equation
   19,931.01 : 27,504.49 = 10,978.53 : x
2. Step 2: Convert to fraction form
   19,931.01/27,504.49 = 10,978.53/x
3. Step 3: Cross multiply
   19,931.01x = 27,504.49 × 10,978.53
4. Step 4: Simplify right side
   19,931.01x = 301,958,868.60
5. Step 5: Solve for x
   x = 301,958,868.60/19,931.01
6. Step 6: Final answer
   x = 15,150.20