Finding the Fourth Proportional to 17,141.90, 23,678.41 and 13,156.16

Step by Step Solution

1. Step 1: Write the proportion equation
   17,141.90 : 23,678.41 = 13,156.16 : x
2. Step 2: Convert to fraction form
   17,141.90/23,678.41 = 13,156.16/x
3. Step 3: Cross multiply
   17,141.90x = 23,678.41 × 13,156.16
4. Step 4: Simplify right side
   17,141.90x = 311,516,950.51
5. Step 5: Solve for x
   x = 311,516,950.51/17,141.90
6. Step 6: Final answer
   x = 18,172.84