Finding the Fourth Proportional to 30,870.47, 46,308.81 and 8,381.53

Step by Step Solution

1. Step 1: Write the proportion equation
   30,870.47 : 46,308.81 = 8,381.53 : x
2. Step 2: Convert to fraction form
   30,870.47/46,308.81 = 8,381.53/x
3. Step 3: Cross multiply
   30,870.47x = 46,308.81 × 8,381.53
4. Step 4: Simplify right side
   30,870.47x = 388,138,680.28
5. Step 5: Solve for x
   x = 388,138,680.28/30,870.47
6. Step 6: Final answer
   x = 12,573.14