Finding the Fourth Proportional to 35,910, 49,561.56 and 21,003.12

Step by Step Solution

1. Step 1: Write the proportion equation
   35,910 : 49,561.56 = 21,003.12 : x
2. Step 2: Convert to fraction form
   35,910/49,561.56 = 21,003.12/x
3. Step 3: Cross multiply
   35,910x = 49,561.56 × 21,003.12
4. Step 4: Simplify right side
   35,910x = 1,040,947,392.07
5. Step 5: Solve for x
   x = 1,040,947,392.07/35,910
6. Step 6: Final answer
   x = 28,987.67