Finding the Fourth Proportional to 19,978.77, 27,570.18 and 11,026.17

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.77 : 27,570.18 = 11,026.17 : x
2. Step 2: Convert to fraction form
   19,978.77/27,570.18 = 11,026.17/x
3. Step 3: Cross multiply
   19,978.77x = 27,570.18 × 11,026.17
4. Step 4: Simplify right side
   19,978.77x = 303,993,491.61
5. Step 5: Solve for x
   x = 303,993,491.61/19,978.77
6. Step 6: Final answer
   x = 15,215.83