Finding the Fourth Proportional to 6,111.55, 9,166.78 and 1,728.91

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.55 : 9,166.78 = 1,728.91 : x
2. Step 2: Convert to fraction form
   6,111.55/9,166.78 = 1,728.91/x
3. Step 3: Cross multiply
   6,111.55x = 9,166.78 × 1,728.91
4. Step 4: Simplify right side
   6,111.55x = 15,848,537.61
5. Step 5: Solve for x
   x = 15,848,537.61/6,111.55
6. Step 6: Final answer
   x = 2,593.21