Finding the Fourth Proportional to 12,491.89, 17,238.79 and 6,902.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,491.89 : 17,238.79 = 6,902.89 : x
2. Step 2: Convert to fraction form
   12,491.89/17,238.79 = 6,902.89/x
3. Step 3: Cross multiply
   12,491.89x = 17,238.79 × 6,902.89
4. Step 4: Simplify right side
   12,491.89x = 118,997,471.10
5. Step 5: Solve for x
   x = 118,997,471.10/12,491.89
6. Step 6: Final answer
   x = 9,525.98