Finding the Fourth Proportional to 8,978.88, 13,462.08 and 3,780.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.88 : 13,462.08 = 3,780.48 : x
2. Step 2: Convert to fraction form
   8,978.88/13,462.08 = 3,780.48/x
3. Step 3: Cross multiply
   8,978.88x = 13,462.08 × 3,780.48
4. Step 4: Simplify right side
   8,978.88x = 50,893,124.20
5. Step 5: Solve for x
   x = 50,893,124.20/8,978.88
6. Step 6: Final answer
   x = 5,668.09