Finding the Fourth Proportional to 1,499.90, 2,069.84 and 870.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.90 : 2,069.84 = 870.54 : x
2. Step 2: Convert to fraction form
   1,499.90/2,069.84 = 870.54/x
3. Step 3: Cross multiply
   1,499.90x = 2,069.84 × 870.54
4. Step 4: Simplify right side
   1,499.90x = 1,801,874.16
5. Step 5: Solve for x
   x = 1,801,874.16/1,499.90
6. Step 6: Final answer
   x = 1,201.33