Finding the Fourth Proportional to 111,177.36, 153,426.72 and 79,400.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,177.36 : 153,426.72 = 79,400.40 : x
2. Step 2: Convert to fraction form
   111,177.36/153,426.72 = 79,400.40/x
3. Step 3: Cross multiply
   111,177.36x = 153,426.72 × 79,400.40
4. Step 4: Simplify right side
   111,177.36x = 12,182,142,938.69
5. Step 5: Solve for x
   x = 12,182,142,938.69/111,177.36
6. Step 6: Final answer
   x = 109,573.95