Finding the Fourth Proportional to 1,491.33, 2,057.89 and 870.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.33 : 2,057.89 = 870.69 : x
2. Step 2: Convert to fraction form
   1,491.33/2,057.89 = 870.69/x
3. Step 3: Cross multiply
   1,491.33x = 2,057.89 × 870.69
4. Step 4: Simplify right side
   1,491.33x = 1,791,779.89
5. Step 5: Solve for x
   x = 1,791,779.89/1,491.33
6. Step 6: Final answer
   x = 1,201.46