Finding the Fourth Proportional to 30,782.42, 42,475.96 and 17,167.28

Step by Step Solution

1. Step 1: Write the proportion equation
   30,782.42 : 42,475.96 = 17,167.28 : x
2. Step 2: Convert to fraction form
   30,782.42/42,475.96 = 17,167.28/x
3. Step 3: Cross multiply
   30,782.42x = 42,475.96 × 17,167.28
4. Step 4: Simplify right side
   30,782.42x = 729,196,507.67
5. Step 5: Solve for x
   x = 729,196,507.67/30,782.42
6. Step 6: Final answer
   x = 23,688.73