Finding the Fourth Proportional to 105,535.62, 145,576.17 and 91,363.86

Step by Step Solution

1. Step 1: Write the proportion equation
   105,535.62 : 145,576.17 = 91,363.86 : x
2. Step 2: Convert to fraction form
   105,535.62/145,576.17 = 91,363.86/x
3. Step 3: Cross multiply
   105,535.62x = 145,576.17 × 91,363.86
4. Step 4: Simplify right side
   105,535.62x = 13,300,400,815.22
5. Step 5: Solve for x
   x = 13,300,400,815.22/105,535.62
6. Step 6: Final answer
   x = 126,027.60