Finding the Fourth Proportional to 57,401.20, 86,101.98 and 17,420.51

Step by Step Solution

1. Step 1: Write the proportion equation
   57,401.20 : 86,101.98 = 17,420.51 : x
2. Step 2: Convert to fraction form
   57,401.20/86,101.98 = 17,420.51/x
3. Step 3: Cross multiply
   57,401.20x = 86,101.98 × 17,420.51
4. Step 4: Simplify right side
   57,401.20x = 1,499,940,553.54
5. Step 5: Solve for x
   x = 1,499,940,553.54/57,401.20
6. Step 6: Final answer
   x = 26,130.82