Finding the Fourth Proportional to 1,109.34, 1,532.79 and 878.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.34 : 1,532.79 = 878.22 : x
2. Step 2: Convert to fraction form
   1,109.34/1,532.79 = 878.22/x
3. Step 3: Cross multiply
   1,109.34x = 1,532.79 × 878.22
4. Step 4: Simplify right side
   1,109.34x = 1,346,126.83
5. Step 5: Solve for x
   x = 1,346,126.83/1,109.34
6. Step 6: Final answer
   x = 1,213.45