Finding the Fourth Proportional to 9,856.86, 14,784.33 and 2,931.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.86 : 14,784.33 = 2,931.42 : x
2. Step 2: Convert to fraction form
   9,856.86/14,784.33 = 2,931.42/x
3. Step 3: Cross multiply
   9,856.86x = 14,784.33 × 2,931.42
4. Step 4: Simplify right side
   9,856.86x = 43,339,080.65
5. Step 5: Solve for x
   x = 43,339,080.65/9,856.86
6. Step 6: Final answer
   x = 4,396.84