Finding the Fourth Proportional to 9,779.82, 14,672.49 and 3,940.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,779.82 : 14,672.49 = 3,940.53 : x
2. Step 2: Convert to fraction form
   9,779.82/14,672.49 = 3,940.53/x
3. Step 3: Cross multiply
   9,779.82x = 14,672.49 × 3,940.53
4. Step 4: Simplify right side
   9,779.82x = 57,817,387.02
5. Step 5: Solve for x
   x = 57,817,387.02/9,779.82
6. Step 6: Final answer
   x = 5,911.91