Finding the Fourth Proportional to 8,913.38, 12,300.46 and 5,187.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,913.38 : 12,300.46 = 5,187.38 : x
2. Step 2: Convert to fraction form
   8,913.38/12,300.46 = 5,187.38/x
3. Step 3: Cross multiply
   8,913.38x = 12,300.46 × 5,187.38
4. Step 4: Simplify right side
   8,913.38x = 63,807,085.72
5. Step 5: Solve for x
   x = 63,807,085.72/8,913.38
6. Step 6: Final answer
   x = 7,158.58