Finding the Fourth Proportional to 1,586.01, 2,188.69 and 877.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,586.01 : 2,188.69 = 877.89 : x
2. Step 2: Convert to fraction form
   1,586.01/2,188.69 = 877.89/x
3. Step 3: Cross multiply
   1,586.01x = 2,188.69 × 877.89
4. Step 4: Simplify right side
   1,586.01x = 1,921,429.06
5. Step 5: Solve for x
   x = 1,921,429.06/1,586.01
6. Step 6: Final answer
   x = 1,211.49