Finding the Fourth Proportional to 120,330.72, 180,492.28 and 57,196.24

Step by Step Solution

1. Step 1: Write the proportion equation
   120,330.72 : 180,492.28 = 57,196.24 : x
2. Step 2: Convert to fraction form
   120,330.72/180,492.28 = 57,196.24/x
3. Step 3: Cross multiply
   120,330.72x = 180,492.28 × 57,196.24
4. Step 4: Simplify right side
   120,330.72x = 10,323,479,765.03
5. Step 5: Solve for x
   x = 10,323,479,765.03/120,330.72
6. Step 6: Final answer
   x = 85,792.55