Finding the Fourth Proportional to 91,505.92, 137,145.84 and 54,028

Step by Step Solution

1. Step 1: Write the proportion equation
   91,505.92 : 137,145.84 = 54,028 : x
2. Step 2: Convert to fraction form
   91,505.92/137,145.84 = 54,028/x
3. Step 3: Cross multiply
   91,505.92x = 137,145.84 × 54,028
4. Step 4: Simplify right side
   91,505.92x = 7,409,715,443.52
5. Step 5: Solve for x
   x = 7,409,715,443.52/91,505.92
6. Step 6: Final answer
   x = 80,975.26