Finding the Fourth Proportional to 39,189.50, 54,081.61 and 21,284.81

Step by Step Solution

1. Step 1: Write the proportion equation
   39,189.50 : 54,081.61 = 21,284.81 : x
2. Step 2: Convert to fraction form
   39,189.50/54,081.61 = 21,284.81/x
3. Step 3: Cross multiply
   39,189.50x = 54,081.61 × 21,284.81
4. Step 4: Simplify right side
   39,189.50x = 1,151,116,793.34
5. Step 5: Solve for x
   x = 1,151,116,793.34/39,189.50
6. Step 6: Final answer
   x = 29,373.09