Finding the Fourth Proportional to 23,290.38, 32,140.74 and 12,679.98

Step by Step Solution

1. Step 1: Write the proportion equation
   23,290.38 : 32,140.74 = 12,679.98 : x
2. Step 2: Convert to fraction form
   23,290.38/32,140.74 = 12,679.98/x
3. Step 3: Cross multiply
   23,290.38x = 32,140.74 × 12,679.98
4. Step 4: Simplify right side
   23,290.38x = 407,543,940.39
5. Step 5: Solve for x
   x = 407,543,940.39/23,290.38
6. Step 6: Final answer
   x = 17,498.38