Finding the Fourth Proportional to 1,217.59, 1,822.73 and 1,053.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217.59 : 1,822.73 = 1,053.56 : x
2. Step 2: Convert to fraction form
   1,217.59/1,822.73 = 1,053.56/x
3. Step 3: Cross multiply
   1,217.59x = 1,822.73 × 1,053.56
4. Step 4: Simplify right side
   1,217.59x = 1,920,354.71
5. Step 5: Solve for x
   x = 1,920,354.71/1,217.59
6. Step 6: Final answer
   x = 1,577.18