Finding the Fourth Proportional to 6,897.63, 10,335.09 and 3,978.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,897.63 : 10,335.09 = 3,978.39 : x
2. Step 2: Convert to fraction form
   6,897.63/10,335.09 = 3,978.39/x
3. Step 3: Cross multiply
   6,897.63x = 10,335.09 × 3,978.39
4. Step 4: Simplify right side
   6,897.63x = 41,117,018.71
5. Step 5: Solve for x
   x = 41,117,018.71/6,897.63
6. Step 6: Final answer
   x = 5,961.04