Finding the Fourth Proportional to 12,873.47, 17,765.43 and 7,208.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,873.47 : 17,765.43 = 7,208.46 : x
2. Step 2: Convert to fraction form
   12,873.47/17,765.43 = 7,208.46/x
3. Step 3: Cross multiply
   12,873.47x = 17,765.43 × 7,208.46
4. Step 4: Simplify right side
   12,873.47x = 128,061,364.51
5. Step 5: Solve for x
   x = 128,061,364.51/12,873.47
6. Step 6: Final answer
   x = 9,947.70