Finding the Fourth Proportional to 1,520.16, 2,276.52 and 1,056.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.16 : 2,276.52 = 1,056.72 : x
2. Step 2: Convert to fraction form
   1,520.16/2,276.52 = 1,056.72/x
3. Step 3: Cross multiply
   1,520.16x = 2,276.52 × 1,056.72
4. Step 4: Simplify right side
   1,520.16x = 2,405,644.21
5. Step 5: Solve for x
   x = 2,405,644.21/1,520.16
6. Step 6: Final answer
   x = 1,582.49