Finding the Fourth Proportional to 80,632.72, 120,970.86 and 28,045.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,632.72 : 120,970.86 = 28,045.12 : x
2. Step 2: Convert to fraction form
   80,632.72/120,970.86 = 28,045.12/x
3. Step 3: Cross multiply
   80,632.72x = 120,970.86 × 28,045.12
4. Step 4: Simplify right side
   80,632.72x = 3,392,642,285.20
5. Step 5: Solve for x
   x = 3,392,642,285.20/80,632.72
6. Step 6: Final answer
   x = 42,075.26