Finding the Fourth Proportional to 12,907, 17,803.74 and 7,868.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,907 : 17,803.74 = 7,868.80 : x
2. Step 2: Convert to fraction form
   12,907/17,803.74 = 7,868.80/x
3. Step 3: Cross multiply
   12,907x = 17,803.74 × 7,868.80
4. Step 4: Simplify right side
   12,907x = 140,094,069.31
5. Step 5: Solve for x
   x = 140,094,069.31/12,907
6. Step 6: Final answer
   x = 10,854.12