Finding the Fourth Proportional to 1,327.31, 1,830.42 and 878.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,327.31 : 1,830.42 = 878.98 : x
2. Step 2: Convert to fraction form
   1,327.31/1,830.42 = 878.98/x
3. Step 3: Cross multiply
   1,327.31x = 1,830.42 × 878.98
4. Step 4: Simplify right side
   1,327.31x = 1,608,889.02
5. Step 5: Solve for x
   x = 1,608,889.02/1,327.31
6. Step 6: Final answer
   x = 1,212.14