Finding the Fourth Proportional to 57,118.81, 78,821.83 and 31,624.67

Step by Step Solution

1. Step 1: Write the proportion equation
   57,118.81 : 78,821.83 = 31,624.67 : x
2. Step 2: Convert to fraction form
   57,118.81/78,821.83 = 31,624.67/x
3. Step 3: Cross multiply
   57,118.81x = 78,821.83 × 31,624.67
4. Step 4: Simplify right side
   57,118.81x = 2,492,714,362.55
5. Step 5: Solve for x
   x = 2,492,714,362.55/57,118.81
6. Step 6: Final answer
   x = 43,640.87