Finding the Fourth Proportional to 11,445.78, 17,165.98 and 3,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,445.78 : 17,165.98 = 3,123.82 : x
2. Step 2: Convert to fraction form
   11,445.78/17,165.98 = 3,123.82/x
3. Step 3: Cross multiply
   11,445.78x = 17,165.98 × 3,123.82
4. Step 4: Simplify right side
   11,445.78x = 53,623,375.06
5. Step 5: Solve for x
   x = 53,623,375.06/11,445.78
6. Step 6: Final answer
   x = 4,684.99