Finding the Fourth Proportional to 30,903.72, 42,643.98 and 18,967.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,903.72 : 42,643.98 = 18,967.56 : x
2. Step 2: Convert to fraction form
   30,903.72/42,643.98 = 18,967.56/x
3. Step 3: Cross multiply
   30,903.72x = 42,643.98 × 18,967.56
4. Step 4: Simplify right side
   30,903.72x = 808,852,249.29
5. Step 5: Solve for x
   x = 808,852,249.29/30,903.72
6. Step 6: Final answer
   x = 26,173.30