Finding the Fourth Proportional to 123,585.42, 185,433.51 and 56,989.85

Step by Step Solution

1. Step 1: Write the proportion equation
   123,585.42 : 185,433.51 = 56,989.85 : x
2. Step 2: Convert to fraction form
   123,585.42/185,433.51 = 56,989.85/x
3. Step 3: Cross multiply
   123,585.42x = 185,433.51 × 56,989.85
4. Step 4: Simplify right side
   123,585.42x = 10,567,827,919.87
5. Step 5: Solve for x
   x = 10,567,827,919.87/123,585.42
6. Step 6: Final answer
   x = 85,510.31