Finding the Fourth Proportional to 91,815.34, 137,674.56 and 28,623.68

Step by Step Solution

1. Step 1: Write the proportion equation
   91,815.34 : 137,674.56 = 28,623.68 : x
2. Step 2: Convert to fraction form
   91,815.34/137,674.56 = 28,623.68/x
3. Step 3: Cross multiply
   91,815.34x = 137,674.56 × 28,623.68
4. Step 4: Simplify right side
   91,815.34x = 3,940,753,098.24
5. Step 5: Solve for x
   x = 3,940,753,098.24/91,815.34
6. Step 6: Final answer
   x = 42,920.42