Finding the Fourth Proportional to 17,948.15, 24,768.18 and 9,990.36

Step by Step Solution

1. Step 1: Write the proportion equation
   17,948.15 : 24,768.18 = 9,990.36 : x
2. Step 2: Convert to fraction form
   17,948.15/24,768.18 = 9,990.36/x
3. Step 3: Cross multiply
   17,948.15x = 24,768.18 × 9,990.36
4. Step 4: Simplify right side
   17,948.15x = 247,443,034.74
5. Step 5: Solve for x
   x = 247,443,034.74/17,948.15
6. Step 6: Final answer
   x = 13,786.55