Finding the Fourth Proportional to 30,894.72, 42,619.68 and 18,310.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,894.72 : 42,619.68 = 18,310.56 : x
2. Step 2: Convert to fraction form
   30,894.72/42,619.68 = 18,310.56/x
3. Step 3: Cross multiply
   30,894.72x = 42,619.68 × 18,310.56
4. Step 4: Simplify right side
   30,894.72x = 780,390,207.82
5. Step 5: Solve for x
   x = 780,390,207.82/30,894.72
6. Step 6: Final answer
   x = 25,259.66