Finding the Fourth Proportional to 6,128.39, 9,191.72 and 1,967.86

Step by Step Solution

1. Step 1: Write the proportion equation
   6,128.39 : 9,191.72 = 1,967.86 : x
2. Step 2: Convert to fraction form
   6,128.39/9,191.72 = 1,967.86/x
3. Step 3: Cross multiply
   6,128.39x = 9,191.72 × 1,967.86
4. Step 4: Simplify right side
   6,128.39x = 18,087,972.16
5. Step 5: Solve for x
   x = 18,087,972.16/6,128.39
6. Step 6: Final answer
   x = 2,951.50