Finding the Fourth Proportional to 8,485.43, 12,703.50 and 5,188.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485.43 : 12,703.50 = 5,188.46 : x
2. Step 2: Convert to fraction form
   8,485.43/12,703.50 = 5,188.46/x
3. Step 3: Cross multiply
   8,485.43x = 12,703.50 × 5,188.46
4. Step 4: Simplify right side
   8,485.43x = 65,911,538.09
5. Step 5: Solve for x
   x = 65,911,538.09/8,485.43
6. Step 6: Final answer
   x = 7,767.62