Finding the Fourth Proportional to 111,017.68, 166,515.72 and 61,081.36

Step by Step Solution

1. Step 1: Write the proportion equation
   111,017.68 : 166,515.72 = 61,081.36 : x
2. Step 2: Convert to fraction form
   111,017.68/166,515.72 = 61,081.36/x
3. Step 3: Cross multiply
   111,017.68x = 166,515.72 × 61,081.36
4. Step 4: Simplify right side
   111,017.68x = 10,171,006,638.98
5. Step 5: Solve for x
   x = 10,171,006,638.98/111,017.68
6. Step 6: Final answer
   x = 91,616.10