Finding the Fourth Proportional to 34,139.81, 51,209.69 and 10,766.25

Step by Step Solution

1. Step 1: Write the proportion equation
   34,139.81 : 51,209.69 = 10,766.25 : x
2. Step 2: Convert to fraction form
   34,139.81/51,209.69 = 10,766.25/x
3. Step 3: Cross multiply
   34,139.81x = 51,209.69 × 10,766.25
4. Step 4: Simplify right side
   34,139.81x = 551,336,271.13
5. Step 5: Solve for x
   x = 551,336,271.13/34,139.81
6. Step 6: Final answer
   x = 16,149.36