Finding the Fourth Proportional to 12,613.74, 17,280.91 and 12,140.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.74 : 17,280.91 = 12,140.81 : x
2. Step 2: Convert to fraction form
   12,613.74/17,280.91 = 12,140.81/x
3. Step 3: Cross multiply
   12,613.74x = 17,280.91 × 12,140.81
4. Step 4: Simplify right side
   12,613.74x = 209,804,158.53
5. Step 5: Solve for x
   x = 209,804,158.53/12,613.74
6. Step 6: Final answer
   x = 16,632.99