Finding the Fourth Proportional to 12,870.84, 17,762.10 and 7,281.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.84 : 17,762.10 = 7,281.96 : x
2. Step 2: Convert to fraction form
   12,870.84/17,762.10 = 7,281.96/x
3. Step 3: Cross multiply
   12,870.84x = 17,762.10 × 7,281.96
4. Step 4: Simplify right side
   12,870.84x = 129,342,901.72
5. Step 5: Solve for x
   x = 129,342,901.72/12,870.84
6. Step 6: Final answer
   x = 10,049.30