Finding the Fourth Proportional to 10,005.54, 15,003.18 and 3,429.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,005.54 : 15,003.18 = 3,429.96 : x
2. Step 2: Convert to fraction form
   10,005.54/15,003.18 = 3,429.96/x
3. Step 3: Cross multiply
   10,005.54x = 15,003.18 × 3,429.96
4. Step 4: Simplify right side
   10,005.54x = 51,460,307.27
5. Step 5: Solve for x
   x = 51,460,307.27/10,005.54
6. Step 6: Final answer
   x = 5,143.18