Finding the Fourth Proportional to 111,099.60, 166,575.69 and 61,203.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,099.60 : 166,575.69 = 61,203.60 : x
2. Step 2: Convert to fraction form
   111,099.60/166,575.69 = 61,203.60/x
3. Step 3: Cross multiply
   111,099.60x = 166,575.69 × 61,203.60
4. Step 4: Simplify right side
   111,099.60x = 10,195,031,900.48
5. Step 5: Solve for x
   x = 10,195,031,900.48/111,099.60
6. Step 6: Final answer
   x = 91,764.79