Finding the Fourth Proportional to 12,870.95, 17,760.61 and 7,205.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.95 : 17,760.61 = 7,205.33 : x
2. Step 2: Convert to fraction form
   12,870.95/17,760.61 = 7,205.33/x
3. Step 3: Cross multiply
   12,870.95x = 17,760.61 × 7,205.33
4. Step 4: Simplify right side
   12,870.95x = 127,971,056.05
5. Step 5: Solve for x
   x = 127,971,056.05/12,870.95
6. Step 6: Final answer
   x = 9,942.63