Finding the Fourth Proportional to 9,404.51, 12,978.24 and 5,427.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.51 : 12,978.24 = 5,427.92 : x
2. Step 2: Convert to fraction form
   9,404.51/12,978.24 = 5,427.92/x
3. Step 3: Cross multiply
   9,404.51x = 12,978.24 × 5,427.92
4. Step 4: Simplify right side
   9,404.51x = 70,444,880.91
5. Step 5: Solve for x
   x = 70,444,880.91/9,404.51
6. Step 6: Final answer
   x = 7,490.55