Finding the Fourth Proportional to 9,860.91, 14,787.72 and 2,838.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.91 : 14,787.72 = 2,838.55 : x
2. Step 2: Convert to fraction form
   9,860.91/14,787.72 = 2,838.55/x
3. Step 3: Cross multiply
   9,860.91x = 14,787.72 × 2,838.55
4. Step 4: Simplify right side
   9,860.91x = 41,975,682.61
5. Step 5: Solve for x
   x = 41,975,682.61/9,860.91
6. Step 6: Final answer
   x = 4,256.78