Finding the Fourth Proportional to 6,991.41, 10,488.65 and 4,031.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,991.41 : 10,488.65 = 4,031.78 : x
2. Step 2: Convert to fraction form
   6,991.41/10,488.65 = 4,031.78/x
3. Step 3: Cross multiply
   6,991.41x = 10,488.65 × 4,031.78
4. Step 4: Simplify right side
   6,991.41x = 42,287,856.69
5. Step 5: Solve for x
   x = 42,287,856.69/6,991.41
6. Step 6: Final answer
   x = 6,048.54