Finding the Fourth Proportional to 105,022.56, 144,927.90 and 57,276.84

Step by Step Solution

1. Step 1: Write the proportion equation
   105,022.56 : 144,927.90 = 57,276.84 : x
2. Step 2: Convert to fraction form
   105,022.56/144,927.90 = 57,276.84/x
3. Step 3: Cross multiply
   105,022.56x = 144,927.90 × 57,276.84
4. Step 4: Simplify right side
   105,022.56x = 8,301,012,139.84
5. Step 5: Solve for x
   x = 8,301,012,139.84/105,022.56
6. Step 6: Final answer
   x = 79,040.28