Finding the Fourth Proportional to 30,742.98, 42,429.18 and 17,316.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,742.98 : 42,429.18 = 17,316.78 : x
2. Step 2: Convert to fraction form
   30,742.98/42,429.18 = 17,316.78/x
3. Step 3: Cross multiply
   30,742.98x = 42,429.18 × 17,316.78
4. Step 4: Simplify right side
   30,742.98x = 734,736,775.64
5. Step 5: Solve for x
   x = 734,736,775.64/30,742.98
6. Step 6: Final answer
   x = 23,899.33