Finding the Fourth Proportional to 30,472.32, 42,047.60 and 17,042.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,472.32 : 42,047.60 = 17,042.88 : x
2. Step 2: Convert to fraction form
   30,472.32/42,047.60 = 17,042.88/x
3. Step 3: Cross multiply
   30,472.32x = 42,047.60 × 17,042.88
4. Step 4: Simplify right side
   30,472.32x = 716,612,201.09
5. Step 5: Solve for x
   x = 716,612,201.09/30,472.32
6. Step 6: Final answer
   x = 23,516.82