Finding the Fourth Proportional to 12,055.74, 16,637.30 and 7,021.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,055.74 : 16,637.30 = 7,021.72 : x
2. Step 2: Convert to fraction form
   12,055.74/16,637.30 = 7,021.72/x
3. Step 3: Cross multiply
   12,055.74x = 16,637.30 × 7,021.72
4. Step 4: Simplify right side
   12,055.74x = 116,822,462.16
5. Step 5: Solve for x
   x = 116,822,462.16/12,055.74
6. Step 6: Final answer
   x = 9,690.19