Finding the Fourth Proportional to 8,111.10, 11,192.94 and 5,458.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.10 : 11,192.94 = 5,458.08 : x
2. Step 2: Convert to fraction form
   8,111.10/11,192.94 = 5,458.08/x
3. Step 3: Cross multiply
   8,111.10x = 11,192.94 × 5,458.08
4. Step 4: Simplify right side
   8,111.10x = 61,091,961.96
5. Step 5: Solve for x
   x = 61,091,961.96/8,111.10
6. Step 6: Final answer
   x = 7,531.90