Finding the Fourth Proportional to 17,100.74, 23,612.37 and 13,115.54

Step by Step Solution

1. Step 1: Write the proportion equation
   17,100.74 : 23,612.37 = 13,115.54 : x
2. Step 2: Convert to fraction form
   17,100.74/23,612.37 = 13,115.54/x
3. Step 3: Cross multiply
   17,100.74x = 23,612.37 × 13,115.54
4. Step 4: Simplify right side
   17,100.74x = 309,688,983.23
5. Step 5: Solve for x
   x = 309,688,983.23/17,100.74
6. Step 6: Final answer
   x = 18,109.68