Finding the Fourth Proportional to 11,118.61, 16,666.96 and 5,279.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,118.61 : 16,666.96 = 5,279.32 : x
2. Step 2: Convert to fraction form
   11,118.61/16,666.96 = 5,279.32/x
3. Step 3: Cross multiply
   11,118.61x = 16,666.96 × 5,279.32
4. Step 4: Simplify right side
   11,118.61x = 87,990,215.27
5. Step 5: Solve for x
   x = 87,990,215.27/11,118.61
6. Step 6: Final answer
   x = 7,913.78