Finding the Fourth Proportional to 19,978.84, 27,570.54 and 11,026.18

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.84 : 27,570.54 = 11,026.18 : x
2. Step 2: Convert to fraction form
   19,978.84/27,570.54 = 11,026.18/x
3. Step 3: Cross multiply
   19,978.84x = 27,570.54 × 11,026.18
4. Step 4: Simplify right side
   19,978.84x = 303,997,736.74
5. Step 5: Solve for x
   x = 303,997,736.74/19,978.84
6. Step 6: Final answer
   x = 15,215.99