Finding the Fourth Proportional to 111,057.38, 166,610.67 and 61,111.77

Step by Step Solution

1. Step 1: Write the proportion equation
   111,057.38 : 166,610.67 = 61,111.77 : x
2. Step 2: Convert to fraction form
   111,057.38/166,610.67 = 61,111.77/x
3. Step 3: Cross multiply
   111,057.38x = 166,610.67 × 61,111.77
4. Step 4: Simplify right side
   111,057.38x = 10,181,872,434.38
5. Step 5: Solve for x
   x = 10,181,872,434.38/111,057.38
6. Step 6: Final answer
   x = 91,681.19