Finding the Fourth Proportional to 3,938.72, 5,914.74 and 3,781.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.72 : 5,914.74 = 3,781.76 : x
2. Step 2: Convert to fraction form
   3,938.72/5,914.74 = 3,781.76/x
3. Step 3: Cross multiply
   3,938.72x = 5,914.74 × 3,781.76
4. Step 4: Simplify right side
   3,938.72x = 22,368,127.14
5. Step 5: Solve for x
   x = 22,368,127.14/3,938.72
6. Step 6: Final answer
   x = 5,679.03