Finding the Fourth Proportional to 123,586.42, 185,435.01 and 56,990.85

Step by Step Solution

1. Step 1: Write the proportion equation
   123,586.42 : 185,435.01 = 56,990.85 : x
2. Step 2: Convert to fraction form
   123,586.42/185,435.01 = 56,990.85/x
3. Step 3: Cross multiply
   123,586.42x = 185,435.01 × 56,990.85
4. Step 4: Simplify right side
   123,586.42x = 10,568,098,839.66
5. Step 5: Solve for x
   x = 10,568,098,839.66/123,586.42
6. Step 6: Final answer
   x = 85,511.81