Finding the Fourth Proportional to 12,870.94, 17,761.76 and 7,205.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.94 : 17,761.76 = 7,205.74 : x
2. Step 2: Convert to fraction form
   12,870.94/17,761.76 = 7,205.74/x
3. Step 3: Cross multiply
   12,870.94x = 17,761.76 × 7,205.74
4. Step 4: Simplify right side
   12,870.94x = 127,986,624.50
5. Step 5: Solve for x
   x = 127,986,624.50/12,870.94
6. Step 6: Final answer
   x = 9,943.84