Finding the Fourth Proportional to 1,219.59, 1,825.72 and 1,055.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,219.59 : 1,825.72 = 1,055.56 : x
2. Step 2: Convert to fraction form
   1,219.59/1,825.72 = 1,055.56/x
3. Step 3: Cross multiply
   1,219.59x = 1,825.72 × 1,055.56
4. Step 4: Simplify right side
   1,219.59x = 1,927,157.00
5. Step 5: Solve for x
   x = 1,927,157.00/1,219.59
6. Step 6: Final answer
   x = 1,580.17