Finding the Fourth Proportional to 11,890.77, 17,863.49 and 8,388.83

Step by Step Solution

1. Step 1: Write the proportion equation
   11,890.77 : 17,863.49 = 8,388.83 : x
2. Step 2: Convert to fraction form
   11,890.77/17,863.49 = 8,388.83/x
3. Step 3: Cross multiply
   11,890.77x = 17,863.49 × 8,388.83
4. Step 4: Simplify right side
   11,890.77x = 149,853,649.56
5. Step 5: Solve for x
   x = 149,853,649.56/11,890.77
6. Step 6: Final answer
   x = 12,602.52