Finding the Fourth Proportional to 12,840.68, 17,714.94 and 7,803.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,840.68 : 17,714.94 = 7,803.02 : x
2. Step 2: Convert to fraction form
   12,840.68/17,714.94 = 7,803.02/x
3. Step 3: Cross multiply
   12,840.68x = 17,714.94 × 7,803.02
4. Step 4: Simplify right side
   12,840.68x = 138,230,031.12
5. Step 5: Solve for x
   x = 138,230,031.12/12,840.68
6. Step 6: Final answer
   x = 10,765.01