Finding the Fourth Proportional to 12,907.88, 17,811.72 and 7,873.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,907.88 : 17,811.72 = 7,873.58 : x
2. Step 2: Convert to fraction form
   12,907.88/17,811.72 = 7,873.58/x
3. Step 3: Cross multiply
   12,907.88x = 17,811.72 × 7,873.58
4. Step 4: Simplify right side
   12,907.88x = 140,242,002.36
5. Step 5: Solve for x
   x = 140,242,002.36/12,907.88
6. Step 6: Final answer
   x = 10,864.84