Finding the Fourth Proportional to 111,039.72, 153,008.10 and 79,140.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111,039.72 : 153,008.10 = 79,140.84 : x
2. Step 2: Convert to fraction form
   111,039.72/153,008.10 = 79,140.84/x
3. Step 3: Cross multiply
   111,039.72x = 153,008.10 × 79,140.84
4. Step 4: Simplify right side
   111,039.72x = 12,109,189,560.80
5. Step 5: Solve for x
   x = 12,109,189,560.80/111,039.72
6. Step 6: Final answer
   x = 109,052.77