Finding the Fourth Proportional to 1,555.58, 2,333.31 and 905.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.58 : 2,333.31 = 905.82 : x
2. Step 2: Convert to fraction form
   1,555.58/2,333.31 = 905.82/x
3. Step 3: Cross multiply
   1,555.58x = 2,333.31 × 905.82
4. Step 4: Simplify right side
   1,555.58x = 2,113,558.86
5. Step 5: Solve for x
   x = 2,113,558.86/1,555.58
6. Step 6: Final answer
   x = 1,358.70