Finding the Fourth Proportional to 17,405.16, 26,105.70 and 5,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,405.16 : 26,105.70 = 5,715.50 : x
2. Step 2: Convert to fraction form
   17,405.16/26,105.70 = 5,715.50/x
3. Step 3: Cross multiply
   17,405.16x = 26,105.70 × 5,715.50
4. Step 4: Simplify right side
   17,405.16x = 149,207,128.35
5. Step 5: Solve for x
   x = 149,207,128.35/17,405.16
6. Step 6: Final answer
   x = 8,572.58