Finding the Fourth Proportional to 111,429.58, 153,749.16 and 66,122.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111,429.58 : 153,749.16 = 66,122.30 : x
2. Step 2: Convert to fraction form
   111,429.58/153,749.16 = 66,122.30/x
3. Step 3: Cross multiply
   111,429.58x = 153,749.16 × 66,122.30
4. Step 4: Simplify right side
   111,429.58x = 10,166,248,082.27
5. Step 5: Solve for x
   x = 10,166,248,082.27/111,429.58
6. Step 6: Final answer
   x = 91,234.73