Finding the Fourth Proportional to 9,888.42, 14,832.69 and 3,315.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,888.42 : 14,832.69 = 3,315.12 : x
2. Step 2: Convert to fraction form
   9,888.42/14,832.69 = 3,315.12/x
3. Step 3: Cross multiply
   9,888.42x = 14,832.69 × 3,315.12
4. Step 4: Simplify right side
   9,888.42x = 49,172,147.27
5. Step 5: Solve for x
   x = 49,172,147.27/9,888.42
6. Step 6: Final answer
   x = 4,972.70