Finding the Fourth Proportional to 39,707.52, 54,797.72 and 21,804.52

Step by Step Solution

1. Step 1: Write the proportion equation
   39,707.52 : 54,797.72 = 21,804.52 : x
2. Step 2: Convert to fraction form
   39,707.52/54,797.72 = 21,804.52/x
3. Step 3: Cross multiply
   39,707.52x = 54,797.72 × 21,804.52
4. Step 4: Simplify right side
   39,707.52x = 1,194,837,981.69
5. Step 5: Solve for x
   x = 1,194,837,981.69/39,707.52
6. Step 6: Final answer
   x = 30,090.97