Finding the Fourth Proportional to 9,406.19, 12,980.59 and 5,427.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,406.19 : 12,980.59 = 5,427.34 : x
2. Step 2: Convert to fraction form
   9,406.19/12,980.59 = 5,427.34/x
3. Step 3: Cross multiply
   9,406.19x = 12,980.59 × 5,427.34
4. Step 4: Simplify right side
   9,406.19x = 70,450,029.31
5. Step 5: Solve for x
   x = 70,450,029.31/9,406.19
6. Step 6: Final answer
   x = 7,489.75