Finding the Fourth Proportional to 11,111.78, 16,657.86 and 4,191.14

Step by Step Solution

1. Step 1: Write the proportion equation
   11,111.78 : 16,657.86 = 4,191.14 : x
2. Step 2: Convert to fraction form
   11,111.78/16,657.86 = 4,191.14/x
3. Step 3: Cross multiply
   11,111.78x = 16,657.86 × 4,191.14
4. Step 4: Simplify right side
   11,111.78x = 69,815,423.36
5. Step 5: Solve for x
   x = 69,815,423.36/11,111.78
6. Step 6: Final answer
   x = 6,283.01