Finding the Fourth Proportional to 1,586,436.76, 2,189,282.72 and 861,284.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,586,436.76 : 2,189,282.72 = 861,284.46 : x
2. Step 2: Convert to fraction form
   1,586,436.76/2,189,282.72 = 861,284.46/x
3. Step 3: Cross multiply
   1,586,436.76x = 2,189,282.72 × 861,284.46
4. Step 4: Simplify right side
   1,586,436.76x = 1,885,595,185,282.53
5. Step 5: Solve for x
   x = 1,885,595,185,282.53/1,586,436.76
6. Step 6: Final answer
   x = 1,188,572.55