Finding the Fourth Proportional to 12,300.27, 18,435.96 and 5,712.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.27 : 18,435.96 = 5,712.57 : x
2. Step 2: Convert to fraction form
   12,300.27/18,435.96 = 5,712.57/x
3. Step 3: Cross multiply
   12,300.27x = 18,435.96 × 5,712.57
4. Step 4: Simplify right side
   12,300.27x = 105,316,712.02
5. Step 5: Solve for x
   x = 105,316,712.02/12,300.27
6. Step 6: Final answer
   x = 8,562.15