Finding the Fourth Proportional to 30,485.45, 42,065.90 and 17,055.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,485.45 : 42,065.90 = 17,055.25 : x
2. Step 2: Convert to fraction form
   30,485.45/42,065.90 = 17,055.25/x
3. Step 3: Cross multiply
   30,485.45x = 42,065.90 × 17,055.25
4. Step 4: Simplify right side
   30,485.45x = 717,444,314.49
5. Step 5: Solve for x
   x = 717,444,314.49/30,485.45
6. Step 6: Final answer
   x = 23,533.99