Finding the Fourth Proportional to 9,128.09, 12,592.77 and 5,349.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.09 : 12,592.77 = 5,349.34 : x
2. Step 2: Convert to fraction form
   9,128.09/12,592.77 = 5,349.34/x
3. Step 3: Cross multiply
   9,128.09x = 12,592.77 × 5,349.34
4. Step 4: Simplify right side
   9,128.09x = 67,363,003.95
5. Step 5: Solve for x
   x = 67,363,003.95/9,128.09
6. Step 6: Final answer
   x = 7,379.75