Finding the Fourth Proportional to 30,621.04, 42,256.79 and 17,192.55

Step by Step Solution

1. Step 1: Write the proportion equation
   30,621.04 : 42,256.79 = 17,192.55 : x
2. Step 2: Convert to fraction form
   30,621.04/42,256.79 = 17,192.55/x
3. Step 3: Cross multiply
   30,621.04x = 42,256.79 × 17,192.55
4. Step 4: Simplify right side
   30,621.04x = 726,502,111.89
5. Step 5: Solve for x
   x = 726,502,111.89/30,621.04
6. Step 6: Final answer
   x = 23,725.59