Finding the Fourth Proportional to 7,382.71, 10,991.71 and 7,279.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,382.71 : 10,991.71 = 7,279.30 : x
2. Step 2: Convert to fraction form
   7,382.71/10,991.71 = 7,279.30/x
3. Step 3: Cross multiply
   7,382.71x = 10,991.71 × 7,279.30
4. Step 4: Simplify right side
   7,382.71x = 80,011,922.57
5. Step 5: Solve for x
   x = 80,011,922.57/7,382.71
6. Step 6: Final answer
   x = 10,837.75