Finding the Fourth Proportional to 9,434.31, 13,019.28 and 5,455.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,434.31 : 13,019.28 = 5,455.34 : x
2. Step 2: Convert to fraction form
   9,434.31/13,019.28 = 5,455.34/x
3. Step 3: Cross multiply
   9,434.31x = 13,019.28 × 5,455.34
4. Step 4: Simplify right side
   9,434.31x = 71,024,533.86
5. Step 5: Solve for x
   x = 71,024,533.86/9,434.31
6. Step 6: Final answer
   x = 7,528.32