Finding the Fourth Proportional to 17,390.43, 26,085.18 and 4,911.30

Step by Step Solution

1. Step 1: Write the proportion equation
   17,390.43 : 26,085.18 = 4,911.30 : x
2. Step 2: Convert to fraction form
   17,390.43/26,085.18 = 4,911.30/x
3. Step 3: Cross multiply
   17,390.43x = 26,085.18 × 4,911.30
4. Step 4: Simplify right side
   17,390.43x = 128,112,144.53
5. Step 5: Solve for x
   x = 128,112,144.53/17,390.43
6. Step 6: Final answer
   x = 7,366.82