Finding the Fourth Proportional to 56,961.15, 85,443.12 and 17,518.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,961.15 : 85,443.12 = 17,518.56 : x
2. Step 2: Convert to fraction form
   56,961.15/85,443.12 = 17,518.56/x
3. Step 3: Cross multiply
   56,961.15x = 85,443.12 × 17,518.56
4. Step 4: Simplify right side
   56,961.15x = 1,496,840,424.31
5. Step 5: Solve for x
   x = 1,496,840,424.31/56,961.15
6. Step 6: Final answer
   x = 26,278.27