Finding the Fourth Proportional to 11,279.98, 16,919.98 and 7,126.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,279.98 : 16,919.98 = 7,126.30 : x
2. Step 2: Convert to fraction form
   11,279.98/16,919.98 = 7,126.30/x
3. Step 3: Cross multiply
   11,279.98x = 16,919.98 × 7,126.30
4. Step 4: Simplify right side
   11,279.98x = 120,576,856.81
5. Step 5: Solve for x
   x = 120,576,856.81/11,279.98
6. Step 6: Final answer
   x = 10,689.46