Finding the Fourth Proportional to 30,486.15, 45,717.72 and 10,489.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,486.15 : 45,717.72 = 10,489.98 : x
2. Step 2: Convert to fraction form
   30,486.15/45,717.72 = 10,489.98/x
3. Step 3: Cross multiply
   30,486.15x = 45,717.72 × 10,489.98
4. Step 4: Simplify right side
   30,486.15x = 479,577,968.45
5. Step 5: Solve for x
   x = 479,577,968.45/30,486.15
6. Step 6: Final answer
   x = 15,731.01