Finding the Fourth Proportional to 30,574.53, 45,858.72 and 8,390.14

Step by Step Solution

1. Step 1: Write the proportion equation
   30,574.53 : 45,858.72 = 8,390.14 : x
2. Step 2: Convert to fraction form
   30,574.53/45,858.72 = 8,390.14/x
3. Step 3: Cross multiply
   30,574.53x = 45,858.72 × 8,390.14
4. Step 4: Simplify right side
   30,574.53x = 384,761,081.02
5. Step 5: Solve for x
   x = 384,761,081.02/30,574.53
6. Step 6: Final answer
   x = 12,584.37