Finding the Fourth Proportional to 57,109.59, 85,672.59 and 17,669.76

Step by Step Solution

1. Step 1: Write the proportion equation
   57,109.59 : 85,672.59 = 17,669.76 : x
2. Step 2: Convert to fraction form
   57,109.59/85,672.59 = 17,669.76/x
3. Step 3: Cross multiply
   57,109.59x = 85,672.59 × 17,669.76
4. Step 4: Simplify right side
   57,109.59x = 1,513,814,103.88
5. Step 5: Solve for x
   x = 1,513,814,103.88/57,109.59
6. Step 6: Final answer
   x = 26,507.18