Finding the Fourth Proportional to 12,429.96, 17,153.34 and 7,127.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.96 : 17,153.34 = 7,127.86 : x
2. Step 2: Convert to fraction form
   12,429.96/17,153.34 = 7,127.86/x
3. Step 3: Cross multiply
   12,429.96x = 17,153.34 × 7,127.86
4. Step 4: Simplify right side
   12,429.96x = 122,266,606.05
5. Step 5: Solve for x
   x = 122,266,606.05/12,429.96
6. Step 6: Final answer
   x = 9,836.44