Finding the Fourth Proportional to 1,498.88, 2,068.80 and 878.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.88 : 2,068.80 = 878.08 : x
2. Step 2: Convert to fraction form
   1,498.88/2,068.80 = 878.08/x
3. Step 3: Cross multiply
   1,498.88x = 2,068.80 × 878.08
4. Step 4: Simplify right side
   1,498.88x = 1,816,571.90
5. Step 5: Solve for x
   x = 1,816,571.90/1,498.88
6. Step 6: Final answer
   x = 1,211.95