Finding the Fourth Proportional to 9,781.59, 14,672.79 and 3,938.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,781.59 : 14,672.79 = 3,938.25 : x
2. Step 2: Convert to fraction form
   9,781.59/14,672.79 = 3,938.25/x
3. Step 3: Cross multiply
   9,781.59x = 14,672.79 × 3,938.25
4. Step 4: Simplify right side
   9,781.59x = 57,785,115.22
5. Step 5: Solve for x
   x = 57,785,115.22/9,781.59
6. Step 6: Final answer
   x = 5,907.54