Finding the Fourth Proportional to 9,315.93, 13,970.92 and 3,074.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.93 : 13,970.92 = 3,074.78 : x
2. Step 2: Convert to fraction form
   9,315.93/13,970.92 = 3,074.78/x
3. Step 3: Cross multiply
   9,315.93x = 13,970.92 × 3,074.78
4. Step 4: Simplify right side
   9,315.93x = 42,957,435.54
5. Step 5: Solve for x
   x = 42,957,435.54/9,315.93
6. Step 6: Final answer
   x = 4,611.18