Finding the Fourth Proportional to 9,978.14, 14,977.61 and 4,435.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.14 : 14,977.61 = 4,435.41 : x
2. Step 2: Convert to fraction form
   9,978.14/14,977.61 = 4,435.41/x
3. Step 3: Cross multiply
   9,978.14x = 14,977.61 × 4,435.41
4. Step 4: Simplify right side
   9,978.14x = 66,431,807.54
5. Step 5: Solve for x
   x = 66,431,807.54/9,978.14
6. Step 6: Final answer
   x = 6,657.74