Finding the Fourth Proportional to 9,815.81, 14,728.45 and 4,885.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,815.81 : 14,728.45 = 4,885.88 : x
2. Step 2: Convert to fraction form
   9,815.81/14,728.45 = 4,885.88/x
3. Step 3: Cross multiply
   9,815.81x = 14,728.45 × 4,885.88
4. Step 4: Simplify right side
   9,815.81x = 71,961,463.89
5. Step 5: Solve for x
   x = 71,961,463.89/9,815.81
6. Step 6: Final answer
   x = 7,331.18