Finding the Fourth Proportional to 30,556.14, 42,167.42 and 18,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,556.14 : 42,167.42 = 18,619.50 : x
2. Step 2: Convert to fraction form
   30,556.14/42,167.42 = 18,619.50/x
3. Step 3: Cross multiply
   30,556.14x = 42,167.42 × 18,619.50
4. Step 4: Simplify right side
   30,556.14x = 785,136,411.54
5. Step 5: Solve for x
   x = 785,136,411.54/30,556.14
6. Step 6: Final answer
   x = 25,694.89