Finding the Fourth Proportional to 1,437.93, 1,984.32 and 878.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.93 : 1,984.32 = 878.31 : x
2. Step 2: Convert to fraction form
   1,437.93/1,984.32 = 878.31/x
3. Step 3: Cross multiply
   1,437.93x = 1,984.32 × 878.31
4. Step 4: Simplify right side
   1,437.93x = 1,742,848.10
5. Step 5: Solve for x
   x = 1,742,848.10/1,437.93
6. Step 6: Final answer
   x = 1,212.05