Finding the Fourth Proportional to 30,485.16, 42,071.15 and 17,055.61

Step by Step Solution

1. Step 1: Write the proportion equation
   30,485.16 : 42,071.15 = 17,055.61 : x
2. Step 2: Convert to fraction form
   30,485.16/42,071.15 = 17,055.61/x
3. Step 3: Cross multiply
   30,485.16x = 42,071.15 × 17,055.61
4. Step 4: Simplify right side
   30,485.16x = 717,549,126.65
5. Step 5: Solve for x
   x = 717,549,126.65/30,485.16
6. Step 6: Final answer
   x = 23,537.65