Finding the Fourth Proportional to 199,857.89, 275,819.61 and 113,820.51

Step by Step Solution

1. Step 1: Write the proportion equation
   199,857.89 : 275,819.61 = 113,820.51 : x
2. Step 2: Convert to fraction form
   199,857.89/275,819.61 = 113,820.51/x
3. Step 3: Cross multiply
   199,857.89x = 275,819.61 × 113,820.51
4. Step 4: Simplify right side
   199,857.89x = 31,393,928,678.20
5. Step 5: Solve for x
   x = 31,393,928,678.20/199,857.89
6. Step 6: Final answer
   x = 157,081.26