Finding the Fourth Proportional to 103,693.28, 155,306.52 and 72,667.04

Step by Step Solution

1. Step 1: Write the proportion equation
   103,693.28 : 155,306.52 = 72,667.04 : x
2. Step 2: Convert to fraction form
   103,693.28/155,306.52 = 72,667.04/x
3. Step 3: Cross multiply
   103,693.28x = 155,306.52 × 72,667.04
4. Step 4: Simplify right side
   103,693.28x = 11,285,665,101.10
5. Step 5: Solve for x
   x = 11,285,665,101.10/103,693.28
6. Step 6: Final answer
   x = 108,837.00