Finding the Fourth Proportional to 111,069.87, 166,530.69 and 61,173.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,069.87 : 166,530.69 = 61,173.60 : x
2. Step 2: Convert to fraction form
   111,069.87/166,530.69 = 61,173.60/x
3. Step 3: Cross multiply
   111,069.87x = 166,530.69 × 61,173.60
4. Step 4: Simplify right side
   111,069.87x = 10,187,281,817.78
5. Step 5: Solve for x
   x = 10,187,281,817.78/111,069.87
6. Step 6: Final answer
   x = 91,719.58