Finding the Fourth Proportional to 11,415.98, 17,091.10 and 8,434.37

Step by Step Solution

1. Step 1: Write the proportion equation
   11,415.98 : 17,091.10 = 8,434.37 : x
2. Step 2: Convert to fraction form
   11,415.98/17,091.10 = 8,434.37/x
3. Step 3: Cross multiply
   11,415.98x = 17,091.10 × 8,434.37
4. Step 4: Simplify right side
   11,415.98x = 144,152,714.38
5. Step 5: Solve for x
   x = 144,152,714.38/11,415.98
6. Step 6: Final answer
   x = 12,627.27