Finding the Fourth Proportional to 1,498.92, 2,068.80 and 869.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.92 : 2,068.80 = 869.55 : x
2. Step 2: Convert to fraction form
   1,498.92/2,068.80 = 869.55/x
3. Step 3: Cross multiply
   1,498.92x = 2,068.80 × 869.55
4. Step 4: Simplify right side
   1,498.92x = 1,798,925.04
5. Step 5: Solve for x
   x = 1,798,925.04/1,498.92
6. Step 6: Final answer
   x = 1,200.15