Finding the Fourth Proportional to 111,153.89, 153,411.75 and 65,857.37

Step by Step Solution

1. Step 1: Write the proportion equation
   111,153.89 : 153,411.75 = 65,857.37 : x
2. Step 2: Convert to fraction form
   111,153.89/153,411.75 = 65,857.37/x
3. Step 3: Cross multiply
   111,153.89x = 153,411.75 × 65,857.37
4. Step 4: Simplify right side
   111,153.89x = 10,103,294,505.10
5. Step 5: Solve for x
   x = 10,103,294,505.10/111,153.89
6. Step 6: Final answer
   x = 90,894.66