Finding the Fourth Proportional to 12,803.02, 17,667.62 and 7,138.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,803.02 : 17,667.62 = 7,138.40 : x
2. Step 2: Convert to fraction form
   12,803.02/17,667.62 = 7,138.40/x
3. Step 3: Cross multiply
   12,803.02x = 17,667.62 × 7,138.40
4. Step 4: Simplify right side
   12,803.02x = 126,118,538.61
5. Step 5: Solve for x
   x = 126,118,538.61/12,803.02
6. Step 6: Final answer
   x = 9,850.69