Finding the Fourth Proportional to 30,705.12, 42,372.72 and 17,276.40

Step by Step Solution

1. Step 1: Write the proportion equation
   30,705.12 : 42,372.72 = 17,276.40 : x
2. Step 2: Convert to fraction form
   30,705.12/42,372.72 = 17,276.40/x
3. Step 3: Cross multiply
   30,705.12x = 42,372.72 × 17,276.40
4. Step 4: Simplify right side
   30,705.12x = 732,048,059.81
5. Step 5: Solve for x
   x = 732,048,059.81/30,705.12
6. Step 6: Final answer
   x = 23,841.24