Finding the Fourth Proportional to 12,803.36, 17,667.90 and 7,137.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,803.36 : 17,667.90 = 7,137.92 : x
2. Step 2: Convert to fraction form
   12,803.36/17,667.90 = 7,137.92/x
3. Step 3: Cross multiply
   12,803.36x = 17,667.90 × 7,137.92
4. Step 4: Simplify right side
   12,803.36x = 126,112,056.77
5. Step 5: Solve for x
   x = 126,112,056.77/12,803.36
6. Step 6: Final answer
   x = 9,849.92