Finding the Fourth Proportional to 30,591.49, 45,886.69 and 8,404.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,591.49 : 45,886.69 = 8,404.78 : x
2. Step 2: Convert to fraction form
   30,591.49/45,886.69 = 8,404.78/x
3. Step 3: Cross multiply
   30,591.49x = 45,886.69 × 8,404.78
4. Step 4: Simplify right side
   30,591.49x = 385,667,534.38
5. Step 5: Solve for x
   x = 385,667,534.38/30,591.49
6. Step 6: Final answer
   x = 12,607.02