Finding the Fourth Proportional to 9,404.01, 12,980.39 and 5,427.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.01 : 12,980.39 = 5,427.72 : x
2. Step 2: Convert to fraction form
   9,404.01/12,980.39 = 5,427.72/x
3. Step 3: Cross multiply
   9,404.01x = 12,980.39 × 5,427.72
4. Step 4: Simplify right side
   9,404.01x = 70,453,935.98
5. Step 5: Solve for x
   x = 70,453,935.98/9,404.01
6. Step 6: Final answer
   x = 7,491.90