Finding the Fourth Proportional to 91,300.91, 136,727.79 and 75,408.71

Step by Step Solution

1. Step 1: Write the proportion equation
   91,300.91 : 136,727.79 = 75,408.71 : x
2. Step 2: Convert to fraction form
   91,300.91/136,727.79 = 75,408.71/x
3. Step 3: Cross multiply
   91,300.91x = 136,727.79 × 75,408.71
4. Step 4: Simplify right side
   91,300.91x = 10,310,465,581.41
5. Step 5: Solve for x
   x = 10,310,465,581.41/91,300.91
6. Step 6: Final answer
   x = 112,928.41