Finding the Fourth Proportional to 1,355.56, 1,870.86 and 824.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.56 : 1,870.86 = 824.46 : x
2. Step 2: Convert to fraction form
   1,355.56/1,870.86 = 824.46/x
3. Step 3: Cross multiply
   1,355.56x = 1,870.86 × 824.46
4. Step 4: Simplify right side
   1,355.56x = 1,542,449.24
5. Step 5: Solve for x
   x = 1,542,449.24/1,355.56
6. Step 6: Final answer
   x = 1,137.87