Finding the Fourth Proportional to 30,665.47, 42,321.86 and 17,054.87

Step by Step Solution

1. Step 1: Write the proportion equation
   30,665.47 : 42,321.86 = 17,054.87 : x
2. Step 2: Convert to fraction form
   30,665.47/42,321.86 = 17,054.87/x
3. Step 3: Cross multiply
   30,665.47x = 42,321.86 × 17,054.87
4. Step 4: Simplify right side
   30,665.47x = 721,793,820.46
5. Step 5: Solve for x
   x = 721,793,820.46/30,665.47
6. Step 6: Final answer
   x = 23,537.67