Finding the Fourth Proportional to 17,659.47, 26,486.01 and 7,129.05

Step by Step Solution

1. Step 1: Write the proportion equation
   17,659.47 : 26,486.01 = 7,129.05 : x
2. Step 2: Convert to fraction form
   17,659.47/26,486.01 = 7,129.05/x
3. Step 3: Cross multiply
   17,659.47x = 26,486.01 × 7,129.05
4. Step 4: Simplify right side
   17,659.47x = 188,820,089.59
5. Step 5: Solve for x
   x = 188,820,089.59/17,659.47
6. Step 6: Final answer
   x = 10,692.29