Finding the Fourth Proportional to 91,404.99, 137,120.49 and 28,230.35

Step by Step Solution

1. Step 1: Write the proportion equation
   91,404.99 : 137,120.49 = 28,230.35 : x
2. Step 2: Convert to fraction form
   91,404.99/137,120.49 = 28,230.35/x
3. Step 3: Cross multiply
   91,404.99x = 137,120.49 × 28,230.35
4. Step 4: Simplify right side
   91,404.99x = 3,870,958,739.27
5. Step 5: Solve for x
   x = 3,870,958,739.27/91,404.99
6. Step 6: Final answer
   x = 42,349.53