Finding the Fourth Proportional to 111,423.83, 153,784.53 and 66,126.78

Step by Step Solution

1. Step 1: Write the proportion equation
   111,423.83 : 153,784.53 = 66,126.78 : x
2. Step 2: Convert to fraction form
   111,423.83/153,784.53 = 66,126.78/x
3. Step 3: Cross multiply
   111,423.83x = 153,784.53 × 66,126.78
4. Step 4: Simplify right side
   111,423.83x = 10,169,275,782.71
5. Step 5: Solve for x
   x = 10,169,275,782.71/111,423.83
6. Step 6: Final answer
   x = 91,266.62