Finding the Fourth Proportional to 1,437.45, 1,983.62 and 878.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.45 : 1,983.62 = 878.86 : x
2. Step 2: Convert to fraction form
   1,437.45/1,983.62 = 878.86/x
3. Step 3: Cross multiply
   1,437.45x = 1,983.62 × 878.86
4. Step 4: Simplify right side
   1,437.45x = 1,743,309.96
5. Step 5: Solve for x
   x = 1,743,309.96/1,437.45
6. Step 6: Final answer
   x = 1,212.78