Finding the Fourth Proportional to 1,499.72, 2,069.50 and 870.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.72 : 2,069.50 = 870.41 : x
2. Step 2: Convert to fraction form
   1,499.72/2,069.50 = 870.41/x
3. Step 3: Cross multiply
   1,499.72x = 2,069.50 × 870.41
4. Step 4: Simplify right side
   1,499.72x = 1,801,318.12
5. Step 5: Solve for x
   x = 1,801,318.12/1,499.72
6. Step 6: Final answer
   x = 1,201.11