Finding the Fourth Proportional to 8,051.90, 12,091.18 and 5,436.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,051.90 : 12,091.18 = 5,436.20 : x
2. Step 2: Convert to fraction form
   8,051.90/12,091.18 = 5,436.20/x
3. Step 3: Cross multiply
   8,051.90x = 12,091.18 × 5,436.20
4. Step 4: Simplify right side
   8,051.90x = 65,730,072.72
5. Step 5: Solve for x
   x = 65,730,072.72/8,051.90
6. Step 6: Final answer
   x = 8,163.30