Finding the Fourth Proportional to 9,349.76, 12,902.72 and 5,158

Step by Step Solution

1. Step 1: Write the proportion equation
   9,349.76 : 12,902.72 = 5,158 : x
2. Step 2: Convert to fraction form
   9,349.76/12,902.72 = 5,158/x
3. Step 3: Cross multiply
   9,349.76x = 12,902.72 × 5,158
4. Step 4: Simplify right side
   9,349.76x = 66,552,229.76
5. Step 5: Solve for x
   x = 66,552,229.76/9,349.76
6. Step 6: Final answer
   x = 7,118.07