Finding the Fourth Proportional to 39,920.86, 55,090.02 and 22,017.52

Step by Step Solution

1. Step 1: Write the proportion equation
   39,920.86 : 55,090.02 = 22,017.52 : x
2. Step 2: Convert to fraction form
   39,920.86/55,090.02 = 22,017.52/x
3. Step 3: Cross multiply
   39,920.86x = 55,090.02 × 22,017.52
4. Step 4: Simplify right side
   39,920.86x = 1,212,945,617.15
5. Step 5: Solve for x
   x = 1,212,945,617.15/39,920.86
6. Step 6: Final answer
   x = 30,383.75