Finding the Fourth Proportional to 99,408.72, 149,128.20 and 32,855.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,408.72 : 149,128.20 = 32,855.88 : x
2. Step 2: Convert to fraction form
   99,408.72/149,128.20 = 32,855.88/x
3. Step 3: Cross multiply
   99,408.72x = 149,128.20 × 32,855.88
4. Step 4: Simplify right side
   99,408.72x = 4,899,738,243.82
5. Step 5: Solve for x
   x = 4,899,738,243.82/99,408.72
6. Step 6: Final answer
   x = 49,288.82