Finding the Fourth Proportional to 12,356.42, 17,055.05 and 7,637.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,356.42 : 17,055.05 = 7,637.94 : x
2. Step 2: Convert to fraction form
   12,356.42/17,055.05 = 7,637.94/x
3. Step 3: Cross multiply
   12,356.42x = 17,055.05 × 7,637.94
4. Step 4: Simplify right side
   12,356.42x = 130,265,410.41
5. Step 5: Solve for x
   x = 130,265,410.41/12,356.42
6. Step 6: Final answer
   x = 10,542.33