Finding the Fourth Proportional to 5,459.94, 8,191.35 and 2,686.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,459.94 : 8,191.35 = 2,686.50 : x
2. Step 2: Convert to fraction form
   5,459.94/8,191.35 = 2,686.50/x
3. Step 3: Cross multiply
   5,459.94x = 8,191.35 × 2,686.50
4. Step 4: Simplify right side
   5,459.94x = 22,006,061.78
5. Step 5: Solve for x
   x = 22,006,061.78/5,459.94
6. Step 6: Final answer
   x = 4,030.46