Finding the Fourth Proportional to 111,494.16, 153,811.76 and 66,174.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111,494.16 : 153,811.76 = 66,174.12 : x
2. Step 2: Convert to fraction form
   111,494.16/153,811.76 = 66,174.12/x
3. Step 3: Cross multiply
   111,494.16x = 153,811.76 × 66,174.12
4. Step 4: Simplify right side
   111,494.16x = 10,178,357,532.78
5. Step 5: Solve for x
   x = 10,178,357,532.78/111,494.16
6. Step 6: Final answer
   x = 91,290.50