Finding the Fourth Proportional to 8,978.64, 13,469.76 and 3,784.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.64 : 13,469.76 = 3,784.56 : x
2. Step 2: Convert to fraction form
   8,978.64/13,469.76 = 3,784.56/x
3. Step 3: Cross multiply
   8,978.64x = 13,469.76 × 3,784.56
4. Step 4: Simplify right side
   8,978.64x = 50,977,114.91
5. Step 5: Solve for x
   x = 50,977,114.91/8,978.64
6. Step 6: Final answer
   x = 5,677.60