Finding the Fourth Proportional to 30,878.68, 42,613.32 and 18,303.52

Step by Step Solution

1. Step 1: Write the proportion equation
   30,878.68 : 42,613.32 = 18,303.52 : x
2. Step 2: Convert to fraction form
   30,878.68/42,613.32 = 18,303.52/x
3. Step 3: Cross multiply
   30,878.68x = 42,613.32 × 18,303.52
4. Step 4: Simplify right side
   30,878.68x = 779,973,754.89
5. Step 5: Solve for x
   x = 779,973,754.89/30,878.68
6. Step 6: Final answer
   x = 25,259.30