Finding the Fourth Proportional to 9,428.49, 13,010.55 and 5,449.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.49 : 13,010.55 = 5,449.86 : x
2. Step 2: Convert to fraction form
   9,428.49/13,010.55 = 5,449.86/x
3. Step 3: Cross multiply
   9,428.49x = 13,010.55 × 5,449.86
4. Step 4: Simplify right side
   9,428.49x = 70,905,676.02
5. Step 5: Solve for x
   x = 70,905,676.02/9,428.49
6. Step 6: Final answer
   x = 7,520.36