Finding the Fourth Proportional to 9,054.81, 13,578.71 and 3,130.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,054.81 : 13,578.71 = 3,130.61 : x
2. Step 2: Convert to fraction form
   9,054.81/13,578.71 = 3,130.61/x
3. Step 3: Cross multiply
   9,054.81x = 13,578.71 × 3,130.61
4. Step 4: Simplify right side
   9,054.81x = 42,509,561.77
5. Step 5: Solve for x
   x = 42,509,561.77/9,054.81
6. Step 6: Final answer
   x = 4,694.69