Finding the Fourth Proportional to 9,405.95, 12,980.45 and 5,427.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405.95 : 12,980.45 = 5,427.32 : x
2. Step 2: Convert to fraction form
   9,405.95/12,980.45 = 5,427.32/x
3. Step 3: Cross multiply
   9,405.95x = 12,980.45 × 5,427.32
4. Step 4: Simplify right side
   9,405.95x = 70,449,004.56
5. Step 5: Solve for x
   x = 70,449,004.56/9,405.95
6. Step 6: Final answer
   x = 7,489.84