Finding the Fourth Proportional to 112,039.45, 154,401.78 and 80,152.99

Step by Step Solution

1. Step 1: Write the proportion equation
   112,039.45 : 154,401.78 = 80,152.99 : x
2. Step 2: Convert to fraction form
   112,039.45/154,401.78 = 80,152.99/x
3. Step 3: Cross multiply
   112,039.45x = 154,401.78 × 80,152.99
4. Step 4: Simplify right side
   112,039.45x = 12,375,764,328.32
5. Step 5: Solve for x
   x = 12,375,764,328.32/112,039.45
6. Step 6: Final answer
   x = 110,458.99