Finding the Fourth Proportional to 2,089.20, 3,133.52 and 790.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.20 : 3,133.52 = 790.50 : x
2. Step 2: Convert to fraction form
   2,089.20/3,133.52 = 790.50/x
3. Step 3: Cross multiply
   2,089.20x = 3,133.52 × 790.50
4. Step 4: Simplify right side
   2,089.20x = 2,477,047.56
5. Step 5: Solve for x
   x = 2,477,047.56/2,089.20
6. Step 6: Final answer
   x = 1,185.64