Finding the Fourth Proportional to 17,106.06, 25,661.55 and 5,415.30

Step by Step Solution

1. Step 1: Write the proportion equation
   17,106.06 : 25,661.55 = 5,415.30 : x
2. Step 2: Convert to fraction form
   17,106.06/25,661.55 = 5,415.30/x
3. Step 3: Cross multiply
   17,106.06x = 25,661.55 × 5,415.30
4. Step 4: Simplify right side
   17,106.06x = 138,964,991.72
5. Step 5: Solve for x
   x = 138,964,991.72/17,106.06
6. Step 6: Final answer
   x = 8,123.73