Finding the Fourth Proportional to 113,881.78, 170,615.31 and 111,393.46

Step by Step Solution

1. Step 1: Write the proportion equation
   113,881.78 : 170,615.31 = 111,393.46 : x
2. Step 2: Convert to fraction form
   113,881.78/170,615.31 = 111,393.46/x
3. Step 3: Cross multiply
   113,881.78x = 170,615.31 × 111,393.46
4. Step 4: Simplify right side
   113,881.78x = 19,005,429,709.87
5. Step 5: Solve for x
   x = 19,005,429,709.87/113,881.78
6. Step 6: Final answer
   x = 166,887.36