Finding the Fourth Proportional to 5,411.08, 8,128.86 and 4,672.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,411.08 : 8,128.86 = 4,672.96 : x
2. Step 2: Convert to fraction form
   5,411.08/8,128.86 = 4,672.96/x
3. Step 3: Cross multiply
   5,411.08x = 8,128.86 × 4,672.96
4. Step 4: Simplify right side
   5,411.08x = 37,985,837.63
5. Step 5: Solve for x
   x = 37,985,837.63/5,411.08
6. Step 6: Final answer
   x = 7,020.01