Finding the Fourth Proportional to 38,559, 53,218.71 and 21,792

Step by Step Solution

1. Step 1: Write the proportion equation
   38,559 : 53,218.71 = 21,792 : x
2. Step 2: Convert to fraction form
   38,559/53,218.71 = 21,792/x
3. Step 3: Cross multiply
   38,559x = 53,218.71 × 21,792
4. Step 4: Simplify right side
   38,559x = 1,159,742,128.32
5. Step 5: Solve for x
   x = 1,159,742,128.32/38,559
6. Step 6: Final answer
   x = 30,077.08