Finding the Fourth Proportional to 9,870.24, 14,678.42 and 9,558.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.24 : 14,678.42 = 9,558.77 : x
2. Step 2: Convert to fraction form
   9,870.24/14,678.42 = 9,558.77/x
3. Step 3: Cross multiply
   9,870.24x = 14,678.42 × 9,558.77
4. Step 4: Simplify right side
   9,870.24x = 140,307,519.56
5. Step 5: Solve for x
   x = 140,307,519.56/9,870.24
6. Step 6: Final answer
   x = 14,215.20