Finding the Fourth Proportional to 8,346.40, 12,510.56 and 5,426.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,346.40 : 12,510.56 = 5,426.80 : x
2. Step 2: Convert to fraction form
   8,346.40/12,510.56 = 5,426.80/x
3. Step 3: Cross multiply
   8,346.40x = 12,510.56 × 5,426.80
4. Step 4: Simplify right side
   8,346.40x = 67,892,307.01
5. Step 5: Solve for x
   x = 67,892,307.01/8,346.40
6. Step 6: Final answer
   x = 8,134.32