Finding the Fourth Proportional to 9,279.78, 12,806.19 and 5,300.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.78 : 12,806.19 = 5,300.34 : x
2. Step 2: Convert to fraction form
   9,279.78/12,806.19 = 5,300.34/x
3. Step 3: Cross multiply
   9,279.78x = 12,806.19 × 5,300.34
4. Step 4: Simplify right side
   9,279.78x = 67,877,161.10
5. Step 5: Solve for x
   x = 67,877,161.10/9,279.78
6. Step 6: Final answer
   x = 7,314.52