Finding the Fourth Proportional to 9,900.51, 14,815.38 and 8,599.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.51 : 14,815.38 = 8,599.59 : x
2. Step 2: Convert to fraction form
   9,900.51/14,815.38 = 8,599.59/x
3. Step 3: Cross multiply
   9,900.51x = 14,815.38 × 8,599.59
4. Step 4: Simplify right side
   9,900.51x = 127,406,243.42
5. Step 5: Solve for x
   x = 127,406,243.42/9,900.51
6. Step 6: Final answer
   x = 12,868.65