Finding the Fourth Proportional to 111,686.34, 154,128.34 and 60,699.07

Step by Step Solution

1. Step 1: Write the proportion equation
   111,686.34 : 154,128.34 = 60,699.07 : x
2. Step 2: Convert to fraction form
   111,686.34/154,128.34 = 60,699.07/x
3. Step 3: Cross multiply
   111,686.34x = 154,128.34 × 60,699.07
4. Step 4: Simplify right side
   111,686.34x = 9,355,446,665.07
5. Step 5: Solve for x
   x = 9,355,446,665.07/111,686.34
6. Step 6: Final answer
   x = 83,765.36