Finding the Fourth Proportional to 11,877.76, 17,804.22 and 3,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,877.76 : 17,804.22 = 3,978.28 : x
2. Step 2: Convert to fraction form
   11,877.76/17,804.22 = 3,978.28/x
3. Step 3: Cross multiply
   11,877.76x = 17,804.22 × 3,978.28
4. Step 4: Simplify right side
   11,877.76x = 70,830,172.34
5. Step 5: Solve for x
   x = 70,830,172.34/11,877.76
6. Step 6: Final answer
   x = 5,963.26