Finding the Fourth Proportional to 6,419.31, 8,858.54 and 3,586.73

Step by Step Solution

1. Step 1: Write the proportion equation
   6,419.31 : 8,858.54 = 3,586.73 : x
2. Step 2: Convert to fraction form
   6,419.31/8,858.54 = 3,586.73/x
3. Step 3: Cross multiply
   6,419.31x = 8,858.54 × 3,586.73
4. Step 4: Simplify right side
   6,419.31x = 31,773,191.17
5. Step 5: Solve for x
   x = 31,773,191.17/6,419.31
6. Step 6: Final answer
   x = 4,949.63