Finding the Fourth Proportional to 8,978.31, 13,465.31 and 3,977.93

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.31 : 13,465.31 = 3,977.93 : x
2. Step 2: Convert to fraction form
   8,978.31/13,465.31 = 3,977.93/x
3. Step 3: Cross multiply
   8,978.31x = 13,465.31 × 3,977.93
4. Step 4: Simplify right side
   8,978.31x = 53,564,074.38
5. Step 5: Solve for x
   x = 53,564,074.38/8,978.31
6. Step 6: Final answer
   x = 5,965.94