Finding the Fourth Proportional to 1,437.83, 1,984.06 and 878.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.83 : 1,984.06 = 878.43 : x
2. Step 2: Convert to fraction form
   1,437.83/1,984.06 = 878.43/x
3. Step 3: Cross multiply
   1,437.83x = 1,984.06 × 878.43
4. Step 4: Simplify right side
   1,437.83x = 1,742,861.42
5. Step 5: Solve for x
   x = 1,742,861.42/1,437.83
6. Step 6: Final answer
   x = 1,212.15