Finding the Fourth Proportional to 10,077.81, 15,040.50 and 9,815.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,077.81 : 15,040.50 = 9,815.37 : x
2. Step 2: Convert to fraction form
   10,077.81/15,040.50 = 9,815.37/x
3. Step 3: Cross multiply
   10,077.81x = 15,040.50 × 9,815.37
4. Step 4: Simplify right side
   10,077.81x = 147,628,072.49
5. Step 5: Solve for x
   x = 147,628,072.49/10,077.81
6. Step 6: Final answer
   x = 14,648.82