Finding the Fourth Proportional to 30,623.40, 42,256.89 and 17,192.79

Step by Step Solution

1. Step 1: Write the proportion equation
   30,623.40 : 42,256.89 = 17,192.79 : x
2. Step 2: Convert to fraction form
   30,623.40/42,256.89 = 17,192.79/x
3. Step 3: Cross multiply
   30,623.40x = 42,256.89 × 17,192.79
4. Step 4: Simplify right side
   30,623.40x = 726,513,835.82
5. Step 5: Solve for x
   x = 726,513,835.82/30,623.40
6. Step 6: Final answer
   x = 23,724.14