Finding the Fourth Proportional to 10,521.49, 14,538.87 and 9,008.77

Step by Step Solution

1. Step 1: Write the proportion equation
   10,521.49 : 14,538.87 = 9,008.77 : x
2. Step 2: Convert to fraction form
   10,521.49/14,538.87 = 9,008.77/x
3. Step 3: Cross multiply
   10,521.49x = 14,538.87 × 9,008.77
4. Step 4: Simplify right side
   10,521.49x = 130,977,335.89
5. Step 5: Solve for x
   x = 130,977,335.89/10,521.49
6. Step 6: Final answer
   x = 12,448.55