Finding the Fourth Proportional to 8,091.89, 12,138.14 and 2,897.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,091.89 : 12,138.14 = 2,897.76 : x
2. Step 2: Convert to fraction form
   8,091.89/12,138.14 = 2,897.76/x
3. Step 3: Cross multiply
   8,091.89x = 12,138.14 × 2,897.76
4. Step 4: Simplify right side
   8,091.89x = 35,173,416.57
5. Step 5: Solve for x
   x = 35,173,416.57/8,091.89
6. Step 6: Final answer
   x = 4,346.75