Finding the Fourth Proportional to 9,189.07, 13,778.56 and 4,255.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189.07 : 13,778.56 = 4,255.99 : x
2. Step 2: Convert to fraction form
   9,189.07/13,778.56 = 4,255.99/x
3. Step 3: Cross multiply
   9,189.07x = 13,778.56 × 4,255.99
4. Step 4: Simplify right side
   9,189.07x = 58,641,384.45
5. Step 5: Solve for x
   x = 58,641,384.45/9,189.07
6. Step 6: Final answer
   x = 6,381.65