Finding the Fourth Proportional to 17,611.61, 26,422.01 and 5,131.37

Step by Step Solution

1. Step 1: Write the proportion equation
   17,611.61 : 26,422.01 = 5,131.37 : x
2. Step 2: Convert to fraction form
   17,611.61/26,422.01 = 5,131.37/x
3. Step 3: Cross multiply
   17,611.61x = 26,422.01 × 5,131.37
4. Step 4: Simplify right side
   17,611.61x = 135,580,951.69
5. Step 5: Solve for x
   x = 135,580,951.69/17,611.61
6. Step 6: Final answer
   x = 7,698.39