Finding the Fourth Proportional to 30,556.55, 42,167.98 and 17,127.80

Step by Step Solution

1. Step 1: Write the proportion equation
   30,556.55 : 42,167.98 = 17,127.80 : x
2. Step 2: Convert to fraction form
   30,556.55/42,167.98 = 17,127.80/x
3. Step 3: Cross multiply
   30,556.55x = 42,167.98 × 17,127.80
4. Step 4: Simplify right side
   30,556.55x = 722,244,642.81
5. Step 5: Solve for x
   x = 722,244,642.81/30,556.55
6. Step 6: Final answer
   x = 23,636.33