Finding the Fourth Proportional to 39,903.52, 55,066.56 and 21,998.56

Step by Step Solution

1. Step 1: Write the proportion equation
   39,903.52 : 55,066.56 = 21,998.56 : x
2. Step 2: Convert to fraction form
   39,903.52/55,066.56 = 21,998.56/x
3. Step 3: Cross multiply
   39,903.52x = 55,066.56 × 21,998.56
4. Step 4: Simplify right side
   39,903.52x = 1,211,385,024.15
5. Step 5: Solve for x
   x = 1,211,385,024.15/39,903.52
6. Step 6: Final answer
   x = 30,357.85