Finding the Fourth Proportional to 1,081.94, 1,623.15 and 351.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.94 : 1,623.15 = 351.47 : x
2. Step 2: Convert to fraction form
   1,081.94/1,623.15 = 351.47/x
3. Step 3: Cross multiply
   1,081.94x = 1,623.15 × 351.47
4. Step 4: Simplify right side
   1,081.94x = 570,492.59
5. Step 5: Solve for x
   x = 570,492.59/1,081.94
6. Step 6: Final answer
   x = 527.29