Finding the Fourth Proportional to 1,499.40, 2,068.34 and 878.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.40 : 2,068.34 = 878.28 : x
2. Step 2: Convert to fraction form
   1,499.40/2,068.34 = 878.28/x
3. Step 3: Cross multiply
   1,499.40x = 2,068.34 × 878.28
4. Step 4: Simplify right side
   1,499.40x = 1,816,581.66
5. Step 5: Solve for x
   x = 1,816,581.66/1,499.40
6. Step 6: Final answer
   x = 1,211.54