Finding the Fourth Proportional to 4,839.72, 7,262.91 and 1,917.78

Step by Step Solution

1. Step 1: Write the proportion equation
   4,839.72 : 7,262.91 = 1,917.78 : x
2. Step 2: Convert to fraction form
   4,839.72/7,262.91 = 1,917.78/x
3. Step 3: Cross multiply
   4,839.72x = 7,262.91 × 1,917.78
4. Step 4: Simplify right side
   4,839.72x = 13,928,663.54
5. Step 5: Solve for x
   x = 13,928,663.54/4,839.72
6. Step 6: Final answer
   x = 2,877.99