Finding the Fourth Proportional to 38,971.56, 53,781.34 and 21,976.62

Step by Step Solution

1. Step 1: Write the proportion equation
   38,971.56 : 53,781.34 = 21,976.62 : x
2. Step 2: Convert to fraction form
   38,971.56/53,781.34 = 21,976.62/x
3. Step 3: Cross multiply
   38,971.56x = 53,781.34 × 21,976.62
4. Step 4: Simplify right side
   38,971.56x = 1,181,932,072.27
5. Step 5: Solve for x
   x = 1,181,932,072.27/38,971.56
6. Step 6: Final answer
   x = 30,328.07