Finding the Fourth Proportional to 91,624.29, 137,457.90 and 28,441.32

Step by Step Solution

1. Step 1: Write the proportion equation
   91,624.29 : 137,457.90 = 28,441.32 : x
2. Step 2: Convert to fraction form
   91,624.29/137,457.90 = 28,441.32/x
3. Step 3: Cross multiply
   91,624.29x = 137,457.90 × 28,441.32
4. Step 4: Simplify right side
   91,624.29x = 3,909,484,120.43
5. Step 5: Solve for x
   x = 3,909,484,120.43/91,624.29
6. Step 6: Final answer
   x = 42,668.64