Finding the Fourth Proportional to 78,443.10, 108,211.60 and 51,235.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,443.10 : 108,211.60 = 51,235.12 : x
2. Step 2: Convert to fraction form
   78,443.10/108,211.60 = 51,235.12/x
3. Step 3: Cross multiply
   78,443.10x = 108,211.60 × 51,235.12
4. Step 4: Simplify right side
   78,443.10x = 5,544,234,311.39
5. Step 5: Solve for x
   x = 5,544,234,311.39/78,443.10
6. Step 6: Final answer
   x = 70,678.42