Finding the Fourth Proportional to 11,380, 17,070.18 and 3,172

Step by Step Solution

1. Step 1: Write the proportion equation
   11,380 : 17,070.18 = 3,172 : x
2. Step 2: Convert to fraction form
   11,380/17,070.18 = 3,172/x
3. Step 3: Cross multiply
   11,380x = 17,070.18 × 3,172
4. Step 4: Simplify right side
   11,380x = 54,146,610.96
5. Step 5: Solve for x
   x = 54,146,610.96/11,380
6. Step 6: Final answer
   x = 4,758.05