Finding the Fourth Proportional to 72,890.28, 109,276.56 and 30,743.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,890.28 : 109,276.56 = 30,743.16 : x
2. Step 2: Convert to fraction form
   72,890.28/109,276.56 = 30,743.16/x
3. Step 3: Cross multiply
   72,890.28x = 109,276.56 × 30,743.16
4. Step 4: Simplify right side
   72,890.28x = 3,359,506,768.33
5. Step 5: Solve for x
   x = 3,359,506,768.33/72,890.28
6. Step 6: Final answer
   x = 46,089.91