Finding the Fourth Proportional to 30,833.39, 46,248.45 and 8,648.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,833.39 : 46,248.45 = 8,648.30 : x
2. Step 2: Convert to fraction form
   30,833.39/46,248.45 = 8,648.30/x
3. Step 3: Cross multiply
   30,833.39x = 46,248.45 × 8,648.30
4. Step 4: Simplify right side
   30,833.39x = 399,970,238.89
5. Step 5: Solve for x
   x = 399,970,238.89/30,833.39
6. Step 6: Final answer
   x = 12,971.99