Finding the Fourth Proportional to 1,558.55, 2,150.81 and 929.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.55 : 2,150.81 = 929.36 : x
2. Step 2: Convert to fraction form
   1,558.55/2,150.81 = 929.36/x
3. Step 3: Cross multiply
   1,558.55x = 2,150.81 × 929.36
4. Step 4: Simplify right side
   1,558.55x = 1,998,876.78
5. Step 5: Solve for x
   x = 1,998,876.78/1,558.55
6. Step 6: Final answer
   x = 1,282.52