Finding the Fourth Proportional to 3,500.79, 5,251.23 and 903.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,500.79 : 5,251.23 = 903.72 : x
2. Step 2: Convert to fraction form
   3,500.79/5,251.23 = 903.72/x
3. Step 3: Cross multiply
   3,500.79x = 5,251.23 × 903.72
4. Step 4: Simplify right side
   3,500.79x = 4,745,641.58
5. Step 5: Solve for x
   x = 4,745,641.58/3,500.79
6. Step 6: Final answer
   x = 1,355.59