Finding the Fourth Proportional to 91,321.35, 126,103.73 and 57,388.83

Step by Step Solution

1. Step 1: Write the proportion equation
   91,321.35 : 126,103.73 = 57,388.83 : x
2. Step 2: Convert to fraction form
   91,321.35/126,103.73 = 57,388.83/x
3. Step 3: Cross multiply
   91,321.35x = 126,103.73 × 57,388.83
4. Step 4: Simplify right side
   91,321.35x = 7,236,945,523.34
5. Step 5: Solve for x
   x = 7,236,945,523.34/91,321.35
6. Step 6: Final answer
   x = 79,247.03