Finding the Fourth Proportional to 1,612.18, 2,225.55 and 1,320.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.18 : 2,225.55 = 1,320.58 : x
2. Step 2: Convert to fraction form
   1,612.18/2,225.55 = 1,320.58/x
3. Step 3: Cross multiply
   1,612.18x = 2,225.55 × 1,320.58
4. Step 4: Simplify right side
   1,612.18x = 2,939,016.82
5. Step 5: Solve for x
   x = 2,939,016.82/1,612.18
6. Step 6: Final answer
   x = 1,823.01