Finding the Fourth Proportional to 12,803.30, 17,669.98 and 7,138.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,803.30 : 17,669.98 = 7,138.56 : x
2. Step 2: Convert to fraction form
   12,803.30/17,669.98 = 7,138.56/x
3. Step 3: Cross multiply
   12,803.30x = 17,669.98 × 7,138.56
4. Step 4: Simplify right side
   12,803.30x = 126,138,212.43
5. Step 5: Solve for x
   x = 126,138,212.43/12,803.30
6. Step 6: Final answer
   x = 9,852.01