Finding the Fourth Proportional to 11,908.30, 16,424.88 and 7,870.44

Step by Step Solution

1. Step 1: Write the proportion equation
   11,908.30 : 16,424.88 = 7,870.44 : x
2. Step 2: Convert to fraction form
   11,908.30/16,424.88 = 7,870.44/x
3. Step 3: Cross multiply
   11,908.30x = 16,424.88 × 7,870.44
4. Step 4: Simplify right side
   11,908.30x = 129,271,032.55
5. Step 5: Solve for x
   x = 129,271,032.55/11,908.30
6. Step 6: Final answer
   x = 10,855.54