Finding the Fourth Proportional to 30,730.59, 42,406.79 and 17,117.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,730.59 : 42,406.79 = 17,117.91 : x
2. Step 2: Convert to fraction form
   30,730.59/42,406.79 = 17,117.91/x
3. Step 3: Cross multiply
   30,730.59x = 42,406.79 × 17,117.91
4. Step 4: Simplify right side
   30,730.59x = 725,915,529.02
5. Step 5: Solve for x
   x = 725,915,529.02/30,730.59
6. Step 6: Final answer
   x = 23,621.92