Finding the Fourth Proportional to 104,958.72, 144,840.15 and 57,213

Step by Step Solution

1. Step 1: Write the proportion equation
   104,958.72 : 144,840.15 = 57,213 : x
2. Step 2: Convert to fraction form
   104,958.72/144,840.15 = 57,213/x
3. Step 3: Cross multiply
   104,958.72x = 144,840.15 × 57,213
4. Step 4: Simplify right side
   104,958.72x = 8,286,739,501.95
5. Step 5: Solve for x
   x = 8,286,739,501.95/104,958.72
6. Step 6: Final answer
   x = 78,952.37