Finding the Fourth Proportional to 35,801.78, 49,404.78 and 19,887.20

Step by Step Solution

1. Step 1: Write the proportion equation
   35,801.78 : 49,404.78 = 19,887.20 : x
2. Step 2: Convert to fraction form
   35,801.78/49,404.78 = 19,887.20/x
3. Step 3: Cross multiply
   35,801.78x = 49,404.78 × 19,887.20
4. Step 4: Simplify right side
   35,801.78x = 982,522,740.82
5. Step 5: Solve for x
   x = 982,522,740.82/35,801.78
6. Step 6: Final answer
   x = 27,443.40