Finding the Fourth Proportional to 11,891.55, 17,838.18 and 4,100.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,891.55 : 17,838.18 = 4,100.25 : x
2. Step 2: Convert to fraction form
   11,891.55/17,838.18 = 4,100.25/x
3. Step 3: Cross multiply
   11,891.55x = 17,838.18 × 4,100.25
4. Step 4: Simplify right side
   11,891.55x = 73,140,997.55
5. Step 5: Solve for x
   x = 73,140,997.55/11,891.55
6. Step 6: Final answer
   x = 6,150.67