Finding the Fourth Proportional to 11,978.88, 17,975.84 and 5,053.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.88 : 17,975.84 = 5,053.36 : x
2. Step 2: Convert to fraction form
   11,978.88/17,975.84 = 5,053.36/x
3. Step 3: Cross multiply
   11,978.88x = 17,975.84 × 5,053.36
4. Step 4: Simplify right side
   11,978.88x = 90,838,390.82
5. Step 5: Solve for x
   x = 90,838,390.82/11,978.88
6. Step 6: Final answer
   x = 7,583.21