Finding the Fourth Proportional to 8,978.81, 13,462.81 and 3,432.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.81 : 13,462.81 = 3,432.56 : x
2. Step 2: Convert to fraction form
   8,978.81/13,462.81 = 3,432.56/x
3. Step 3: Cross multiply
   8,978.81x = 13,462.81 × 3,432.56
4. Step 4: Simplify right side
   8,978.81x = 46,211,827.20
5. Step 5: Solve for x
   x = 46,211,827.20/8,978.81
6. Step 6: Final answer
   x = 5,146.77