Finding the Fourth Proportional to 10,426.14, 15,630.57 and 7,131.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,426.14 : 15,630.57 = 7,131.06 : x
2. Step 2: Convert to fraction form
   10,426.14/15,630.57 = 7,131.06/x
3. Step 3: Cross multiply
   10,426.14x = 15,630.57 × 7,131.06
4. Step 4: Simplify right side
   10,426.14x = 111,462,532.50
5. Step 5: Solve for x
   x = 111,462,532.50/10,426.14
6. Step 6: Final answer
   x = 10,690.68