Finding the Fourth Proportional to 105,296.10, 145,429.32 and 76,743.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,296.10 : 145,429.32 = 76,743.06 : x
2. Step 2: Convert to fraction form
   105,296.10/145,429.32 = 76,743.06/x
3. Step 3: Cross multiply
   105,296.10x = 145,429.32 × 76,743.06
4. Step 4: Simplify right side
   105,296.10x = 11,160,691,030.52
5. Step 5: Solve for x
   x = 11,160,691,030.52/105,296.10
6. Step 6: Final answer
   x = 105,993.39