Finding the Fourth Proportional to 1,437.91, 1,983.69 and 878.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.91 : 1,983.69 = 878.16 : x
2. Step 2: Convert to fraction form
   1,437.91/1,983.69 = 878.16/x
3. Step 3: Cross multiply
   1,437.91x = 1,983.69 × 878.16
4. Step 4: Simplify right side
   1,437.91x = 1,741,997.21
5. Step 5: Solve for x
   x = 1,741,997.21/1,437.91
6. Step 6: Final answer
   x = 1,211.48