Finding the Fourth Proportional to 105,980.06, 146,251.58 and 57,581.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,980.06 : 146,251.58 = 57,581.48 : x
2. Step 2: Convert to fraction form
   105,980.06/146,251.58 = 57,581.48/x
3. Step 3: Cross multiply
   105,980.06x = 146,251.58 × 57,581.48
4. Step 4: Simplify right side
   105,980.06x = 8,421,382,506.46
5. Step 5: Solve for x
   x = 8,421,382,506.46/105,980.06
6. Step 6: Final answer
   x = 79,461.95