Finding the Fourth Proportional to 9,404.63, 12,979.20 and 5,427.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.63 : 12,979.20 = 5,427.06 : x
2. Step 2: Convert to fraction form
   9,404.63/12,979.20 = 5,427.06/x
3. Step 3: Cross multiply
   9,404.63x = 12,979.20 × 5,427.06
4. Step 4: Simplify right side
   9,404.63x = 70,438,897.15
5. Step 5: Solve for x
   x = 70,438,897.15/9,404.63
6. Step 6: Final answer
   x = 7,489.81