Finding the Fourth Proportional to 123,585.68, 185,433.91 and 56,990.12

Step by Step Solution

1. Step 1: Write the proportion equation
   123,585.68 : 185,433.91 = 56,990.12 : x
2. Step 2: Convert to fraction form
   123,585.68/185,433.91 = 56,990.12/x
3. Step 3: Cross multiply
   123,585.68x = 185,433.91 × 56,990.12
4. Step 4: Simplify right side
   123,585.68x = 10,567,899,713.32
5. Step 5: Solve for x
   x = 10,567,899,713.32/123,585.68
6. Step 6: Final answer
   x = 85,510.71