Finding the Fourth Proportional to 105,023.16, 144,935.46 and 57,279.18

Step by Step Solution

1. Step 1: Write the proportion equation
   105,023.16 : 144,935.46 = 57,279.18 : x
2. Step 2: Convert to fraction form
   105,023.16/144,935.46 = 57,279.18/x
3. Step 3: Cross multiply
   105,023.16x = 144,935.46 × 57,279.18
4. Step 4: Simplify right side
   105,023.16x = 8,301,784,301.72
5. Step 5: Solve for x
   x = 8,301,784,301.72/105,023.16
6. Step 6: Final answer
   x = 79,047.18