Finding the Fourth Proportional to 10,870.39, 16,272.76 and 9,830.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,870.39 : 16,272.76 = 9,830.88 : x
2. Step 2: Convert to fraction form
   10,870.39/16,272.76 = 9,830.88/x
3. Step 3: Cross multiply
   10,870.39x = 16,272.76 × 9,830.88
4. Step 4: Simplify right side
   10,870.39x = 159,975,483.25
5. Step 5: Solve for x
   x = 159,975,483.25/10,870.39
6. Step 6: Final answer
   x = 14,716.63