Finding the Fourth Proportional to 1,527.20, 2,105.48 and 1,213.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.20 : 2,105.48 = 1,213.50 : x
2. Step 2: Convert to fraction form
   1,527.20/2,105.48 = 1,213.50/x
3. Step 3: Cross multiply
   1,527.20x = 2,105.48 × 1,213.50
4. Step 4: Simplify right side
   1,527.20x = 2,554,993.91
5. Step 5: Solve for x
   x = 2,554,993.91/1,527.20
6. Step 6: Final answer
   x = 1,673.00