Finding the Fourth Proportional to 12,429.54, 17,148.90 and 7,123.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.54 : 17,148.90 = 7,123.32 : x
2. Step 2: Convert to fraction form
   12,429.54/17,148.90 = 7,123.32/x
3. Step 3: Cross multiply
   12,429.54x = 17,148.90 × 7,123.32
4. Step 4: Simplify right side
   12,429.54x = 122,157,102.35
5. Step 5: Solve for x
   x = 122,157,102.35/12,429.54
6. Step 6: Final answer
   x = 9,827.97