Finding the Fourth Proportional to 30,667.48, 42,321.49 and 18,567.77

Step by Step Solution

1. Step 1: Write the proportion equation
   30,667.48 : 42,321.49 = 18,567.77 : x
2. Step 2: Convert to fraction form
   30,667.48/42,321.49 = 18,567.77/x
3. Step 3: Cross multiply
   30,667.48x = 42,321.49 × 18,567.77
4. Step 4: Simplify right side
   30,667.48x = 785,815,434.35
5. Step 5: Solve for x
   x = 785,815,434.35/30,667.48
6. Step 6: Final answer
   x = 25,623.74