Finding the Fourth Proportional to 5,402.47, 8,100.82 and 4,779.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,402.47 : 8,100.82 = 4,779.31 : x
2. Step 2: Convert to fraction form
   5,402.47/8,100.82 = 4,779.31/x
3. Step 3: Cross multiply
   5,402.47x = 8,100.82 × 4,779.31
4. Step 4: Simplify right side
   5,402.47x = 38,716,330.03
5. Step 5: Solve for x
   x = 38,716,330.03/5,402.47
6. Step 6: Final answer
   x = 7,166.41