Finding the Fourth Proportional to 17,111.80, 25,665.13 and 5,423.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,111.80 : 25,665.13 = 5,423.50 : x
2. Step 2: Convert to fraction form
   17,111.80/25,665.13 = 5,423.50/x
3. Step 3: Cross multiply
   17,111.80x = 25,665.13 × 5,423.50
4. Step 4: Simplify right side
   17,111.80x = 139,194,832.56
5. Step 5: Solve for x
   x = 139,194,832.56/17,111.80
6. Step 6: Final answer
   x = 8,134.44