Finding the Fourth Proportional to 1,617.17, 2,229.12 and 1,319.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.17 : 2,229.12 = 1,319.63 : x
2. Step 2: Convert to fraction form
   1,617.17/2,229.12 = 1,319.63/x
3. Step 3: Cross multiply
   1,617.17x = 2,229.12 × 1,319.63
4. Step 4: Simplify right side
   1,617.17x = 2,941,602.48
5. Step 5: Solve for x
   x = 2,941,602.48/1,617.17
6. Step 6: Final answer
   x = 1,818.99