Finding the Fourth Proportional to 9,779.96, 14,671.47 and 3,539.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,779.96 : 14,671.47 = 3,539.31 : x
2. Step 2: Convert to fraction form
   9,779.96/14,671.47 = 3,539.31/x
3. Step 3: Cross multiply
   9,779.96x = 14,671.47 × 3,539.31
4. Step 4: Simplify right side
   9,779.96x = 51,926,880.49
5. Step 5: Solve for x
   x = 51,926,880.49/9,779.96
6. Step 6: Final answer
   x = 5,309.52